JP6280852B2 - Motor with position sensor and gas compression apparatus using the same - Google Patents

Description

  The present invention relates to a motor with a position sensor and a gas compression device using the motor, and more particularly to a motor control device by inverter control.

  Light duty compressors are often used in harsh environments for electrical equipment such as dust, condensation, water droplets, and heat, and the risk of failure is high. In addition, due to its usage, it is required to continue operation without stopping as much as possible in the case of a minor failure.

  On the other hand, the conventional compressor uses Hall IC signals to calculate the motor angle and rotation speed. In the case of a three-phase motor, three are used, one for each phase. If any one of them fails, a combination of abnormal hall signals is input, so that both the rotor angle and the rotational speed cannot be calculated. Therefore, it is determined that there is an abnormality and the motor is stopped. For this reason, the compressor cannot be used until the parts replacement / repair is completed even though it is not a fatal failure, and it is inconvenient that it becomes impossible to work with pneumatic equipment and tools for a while. There was sex.

  Moreover, the conventional motor with a position sensor calculates the electrical angle and angular velocity of the motor from the state of signals output from a plurality of position sensors as a motor control using an inverter, and performs PWM control on the output. When an abnormal signal is output, such as when the motor is driven and the position sensor fails, the abnormality is detected and the motor is stopped, or Japanese Patent Laying-Open No. 2012-170689 (Patent Document) The electrical angle and angular velocity of the motor are calculated by the control device using only the elapsed time at the normal position sensor combination as disclosed in 1), and the output to the motor is controlled.

JP 2012-170689 A

  However, when the control as in Patent Document 1 is applied to a gas compression device such as a reciprocating compressor, the calculation accuracy is not good, so that the pulsation of the angular velocity of the motor increases as the pressure increases. In some cases, power efficiency is reduced or the motor is stopped.

  The present invention has been made in view of the above-described problems of the prior art, and aims to increase the calculation accuracy of the angular velocity of the motor and continue to move safely even if the position sensor breaks down. An object of the present invention is to provide a motor with a position sensor using the method and a gas compression device that suppresses rotational pulsation.

  In order to solve the above-described problems, the present invention employs, for example, the configurations described in the claims. The present invention includes a plurality of means for solving the above problems. For example, a motor for driving a mechanical device, an inverter circuit for driving the motor, and a position of the rotor of the motor are detected. A plurality of position sensors, and a control device for controlling the output of the inverter circuit by updating the electrical angle and angular velocity of the motor from the elapsed time of the pulse width calculated from the exclusive OR of the signals generated from the position sensor When the signal from one position sensor among the plurality of position sensors is not normally input during operation of the motor, the control device calculates the angular velocity of the motor from the elapsed time before the update. Calculate the electrical angle and angular velocity using the elapsed time of the pulse width from the previous change to the current change when the signal from another position sensor changes. Configured to.

  According to the present invention, even when the output of the position detection means becomes abnormal, the calculation accuracy of the electrical angle and angular velocity of the motor can be improved, and the gas compression device can be continuously controlled by controlling the output of the inverter. Operation is possible, and it is possible to prevent deterioration of efficiency and unintended stop.

1 is a system configuration diagram of a gas compression device in Embodiment 1. FIG. It is a specific circuit structural example of the motor with a position sensor used for the gas compression apparatus in Example 1. FIG. It is the schematic which shows each signal waveform of the motor with a position sensor in Example 1, and a calculation result. It is a figure which shows the waveform for every 60 degrees of the calculation result of the angular velocity of the motor with a position sensor in Example 1 and 2. FIG. It is a figure which shows the error of the calculation result of the electrical angle of the motor with a position sensor in Example 1 and 2, and the time of an angle update. It is the schematic which shows each signal waveform and calculation result of the motor with a position sensor in Example 2. It is a figure which shows the pressure control of the gas compression apparatus in Example 3 and Example 4. FIG. It is a figure which shows target angular velocity control of the gas compression apparatus in Example 5 and Example 6. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a system configuration diagram of the gas compression apparatus of this embodiment. In FIG. 1, the gas compressor converts the AC power supplied from the power source 1 into a direct current by the bridge diode 3 inside the control device 2, and the angle and angular velocity obtained by detecting the rotor position of the motor 9 obtained from the position detection circuit 11. Information is calculated by the microcomputer 7, the inverter circuit 4 is driven so as to obtain a desired rotation speed, and the motor 9 is rotated. The system includes a compressor main body 10 driven by a motor 9, a temporary storage tank 13 for temporarily storing compressed air discharged from the compressor main body 10, and a pressure sensor 12 for measuring the pressure in the tank. It is roughly composed of As the position detection circuit, a position sensor is used, and examples thereof include a hall sensor, a magnetic sensor, and an optical sensor.

  Moreover, the control apparatus 2 calculates the usage-amount of compressed air from the measured value of the pressure sensor 12, and controls a driving | operation and a stop of a compressor. Here, in this embodiment, the AC power source 1 is directly rectified and used, but the inverter circuit 4 may be connected via a power factor correction circuit or a booster circuit.

  In FIG. 2, the circuit block diagram of the motor with a position sensor used for the gas compression apparatus of a present Example is shown. As shown in FIG. 2, in the case of a three-phase motor, the inverter circuit 4 includes six power elements 401, and the rotation angle and angular velocity of the motor are determined by the position signal 20 output from the position detection circuit 11. Is calculated by the microcomputer 7 and the output is controlled by the drive signal 19 of the power element 401 so as to obtain a desired rotation characteristic.

  In this configuration, when the pressure in the tank 13 reaches a predetermined upper limit value, the compressor stops, the pressure decreases as the compressed air in the tank 13 is used, and when the pressure reaches a predetermined lower limit value, the motor 9 Is restarted, compression starts again, and the compressed air is stored in the tank 13.

  Here, when one of the plurality of position sensors on which the position detection circuit 11 is mounted malfunctions due to a failure, disconnection, or short circuit, the combination of the output position signals 20 becomes abnormal, and the motor is It stops, or the motor is operated by estimating the position and speed from the information of the normal signal before the update. On the other hand, in the case of a reciprocating compressor, the rotation pulsation in the original normal state is large, so when the position detection circuit is abnormal, the calculation error becomes large and the efficiency of the motor decreases, or in the worst case. There was a risk that the motor would stop.

  FIG. 3 is a schematic diagram showing signal waveforms and calculation results of the motor with the position sensor in the present embodiment. In FIG. 3, HU, HV, and HW are the position signal outputs of the position detection circuits of the U phase, V phase, and W phase in the three phases. XOR is an exclusive OR of each position signal output, HU, HV, and HW. Further, Up, Vp, Wp, Un, Vn, and Wn are output signals to each of the six power elements 401 in the inverter circuit 4 of FIG. The lower table is a table summarizing values and calculation results for the electric angles of the motors of the respective signal waveforms.

  As shown in FIG. 3, when each position detection circuit in each phase is normal, the edge signals of the position signal outputs HU, HV, HW, that is, pulses calculated from their exclusive OR XOR. The angular velocity is updated every 60 ° electrical angle according to the width (t1).

  Here, for example, when an abnormality occurs in the position signal HW of the W phase and it is determined that the LO is fixed, the pulse width before updating calculated from the exclusive OR XOR of the position signal outputs HU, HV, HW The angular velocity is calculated using t1, and when it is determined that the next pulse width t2 being measured is rotated by 60 ° during measurement, the output to the motor is changed to the next phase while continuing t2 measurement. The motor angle is calculated by continuously using the angular velocity calculated with the XOR pulse width t1 before the update.

  Next, when the output of the normal position signal is updated and a change occurs in the XOR signal, that is, when HU or HV which is a binary signal from another normal position sensor among a plurality of position sensors changes. When a change occurs in the pulse width calculated from XOR, the elapsed time from the previous change to the current change, in this embodiment, the pulse width t2 calculated from XOR when HV changes Is equivalent to an electrical angle of 120 °, the electrical angle and angular velocity between the next electrical angles of 60 ° are calculated. Thereby, the angular velocity and the electrical angle can be updated four times per electrical angle 360 ° (that is, t1, t2, t4, t5), and the calculation accuracy of the electrical angle and the angular velocity can be expected to be improved.

Specifically, when the rising angle of HV is 0 °, the state until the electrical angle of the motor rotates 360 ° is roughly divided into six states, and the angular velocity is calculated every 60 °, which is the same as the interval before update. When each position detection circuit in each phase is normal, the XOR pulse width t1 is rotated by 60 ° from 60 ° to 120 ° and 60 ° from 120 ° to 180 °. Therefore, the angular velocity ωr (60) from the angle 60 ° to 120 ° and the angular velocity ωr (120) from the angle 120 ° to 180 ° are expressed by Expression (1).
ωr (60) = ωr (120) = 2π × (1 / t1 × 6) (1)

Then, the time t2 from when an abnormal position signal output is input from one position detection circuit to the next time when a normal position signal is input from another position detection circuit is rotated by 120 ° from 60 ° to 180 °. Therefore, the angular velocity ωr (180) from the next angle 180 ° to 240 ° is expressed by equation (2).
ωr (180) = 2π × (1 / t2 × 3) (2)

Similarly, the time t5 until the next abnormal position signal output is inputted and the normal signal is inputted again from another position detection circuit is also the time until the rotation of 120 ° from 240 ° to 360 °. Accordingly, the angular velocity ωr (0) from the next angle 0 ° to 60 ° is expressed by Expression (3).
ωr (0) = 2π × (1 / t5 × 3) (3)

  In addition, what put together the calculation formula of these angular velocities for every angle of 60 degrees is shown in the column of the angular velocity of the lower table of FIG.

  In the lower table of FIG. 3, U, V, W, and XOR indicate the values obtained by binarizing the signal waveforms of HU, HV, HW, and XOR in FIG. It is a value obtained by assigning bits V and W (ie, weighting 1, 2, and 4 respectively) and adding them. Further, the column of correction sum is an added value corrected to be the sum when the position detection circuit is normal. For example, in the lower table of FIG. 3, the values of U, V, and W in the column from the angle 180 ° to 240 ° are 0, 0, 0. As indicated by arrows, the values of U, V, and W are regarded as 0, 0, 1 and the correction sum is set to 4. The angle 120 ° to 180 ° and the angle 240 ° to 300 ° are also corrected by the correction sum as shown by the arrows. In this way, the signal waveform is handled as a binarized value, bit-assigned, and processed as a sum and correction sum, so that it can be processed as software processing.

  FIG. 4 shows a comparison of the calculation characteristics of the angular velocity according to the present embodiment, the calculation results of the angular velocity when the position detection circuit is normal, and the calculation characteristics when only normal signals (only t1 and t4) are used. In FIG. 4, the characteristic indicated as the actual angular velocity is the calculation result of the angular velocity when the position detection circuit is normal. On the other hand, the characteristic indicated as “normal signal limited use” shows the calculation characteristic when only normal signals (only t1 and t4) are used. In the case of normal signal limited use, only t1 and t4 are used, so the angular velocity can be updated only twice per 360 ° electrical angle. For example, the angular velocities at the motor angles of 240 °, 300 °, and 0 ° are the same. It is a value. On the other hand, the characteristic indicated as Example 1 is the angular velocity calculation characteristic in this example. In this embodiment, since the angular velocity is calculated using not only a normal signal but also an abnormal position detection circuit signal, the angular velocity can be updated four times per 360 ° electrical angle. Therefore, it is possible to obtain a calculation result closer to the actual angular velocity than in the case of conventional normal signal limited use.

FIG. 5 shows the calculation error of the electrical angle and the timing of the angle update. The angle is obtained by multiplying the angular velocity by time. In FIG. 5, (A) shows an angle calculation error when resetting only with a normal signal, and (B) shows an angle calculation error in this embodiment. In the case of the prior art of (A), when the electrical angle of the motor is rotated once, the angle is updated at two points, point A (180 °) and point B (0 °), so the error is large. Become. On the other hand, in this embodiment, by using an abnormal position signal, the angle can be updated at the point C (300 °) and the point D (120 °) in addition to the points A and B. As a result, it is possible to reduce the accumulated error of the angle calculation.
In this embodiment, the output signal HW of the position detection circuit for the W phase of the motor has been described as malfunctioning when the LO is fixed. However, the output signal HU of the U phase or the output signal HV of the V phase may be used. It may be a failure or an intermediate value failure.

  As described above, the present embodiment is generated from the motor for driving the mechanical device, the inverter circuit for driving the motor, the plurality of position sensors for detecting the position of the rotor of the motor, and the position sensor. In the motor with a position sensor, the control device updates the electric angle and angular velocity of the motor from the elapsed time of the pulse width calculated from the exclusive OR of the signals to be controlled, and controls the output of the inverter circuit. When the signal from one of the multiple position sensors is not input normally during motor operation, the angular velocity of the motor is calculated from the elapsed time before the update, and the signal from the other position sensor has changed. In some cases, the electrical angle and the angular velocity are calculated using the elapsed time of the pulse width from the previous change to the current change.

  In other words, when the signal from one position sensor among the plurality of position sensors is not normally input during operation of the motor, the control device is calculated from an exclusive OR of signals generated from the position sensor. The angular velocity is calculated by assuming that the elapsed time of the pulse width corresponds to a predetermined electrical angle.

  The motor is a three-phase motor and has three position sensors. The control device normally inputs a signal from one of the position sensors during operation of the motor. If not, when the signal from another position sensor changes, the angular velocity is calculated by setting the elapsed time of the pulse width from the previous change to the current change as the electrical angle of 120 °, and then the position sensor signal changes It is configured to calculate the electrical angle and angular velocity until it is done.

  Further, a three-phase motor for driving the mechanical device, an inverter circuit for driving the motor, three position sensors for detecting the position of the rotor of the motor, and a signal generated from the position sensor are used. A motor with a position sensor that updates the angular velocity of the motor every 60 ° of electrical angle and controls the output of the inverter circuit, and the control device receives a signal from one of the three position sensors. When the signal is not normally input during the operation of the motor, the angular velocity is updated four times per 360 electrical degrees.

  In addition, the motor with the position sensor, the compressor main body that is driven by the position sensor motor and compresses the gas to generate the compressed gas, and the pressure sensor that measures the pressure of the compressed gas. The gas compression device that calculates the electrical angle and angular velocity of the motor and controls the output to the motor is configured by the control device.

  As described above, according to the present embodiment, even if the position sensor fails, the rotational angle and output of the motor are obtained by calculating the electrical angle and angular velocity of the motor by using the input signal of the abnormal position sensor. Can be appropriately controlled, the calculation accuracy of the angular velocity of the motor can be increased, and it is possible to continue to operate safely. In addition, it is possible to provide a motor with a position sensor using a calculation method that increases calculation accuracy, and a gas compression device that can suppress rotation pulsation and prevent efficiency reduction and stoppage.

  In the first embodiment, when the change in the angular velocity while the electrical angle advances by 360 ° is severe, the calculation result is delayed or the error becomes large with respect to the original angular velocity, such as point A and point B in FIG. There is. On the other hand, the conventional estimation calculation method using only normal signals has a problem such as a large error because the calculation is performed at the same angular velocity until the electrical angle advances by 180 °.

  Therefore, in this embodiment, an embodiment is described in which the calculation accuracy is improved by using the calculation method using both the normal signal pulse widths t1 and t4 and the abnormal signal pulse widths t2 and t5 before the update. To do.

FIG. 6 is a schematic diagram showing signal waveforms and calculation results of a motor with a position sensor in the present embodiment. In FIG. 6, for example, when it is determined that an abnormality has occurred in the position signal HW of the W phase and the LO is fixed, the pulse width before update calculated from the exclusive OR XOR of the position signal outputs HU, HV, HW If the angular velocity is calculated using t1 and it is determined that the next pulse width t2 being measured has been rotated by 60 ° during measurement, the output to the motor continues to the next phase while continuing t2 measurement. The angle of the motor is calculated by continuously using the angular velocity calculated with the XOR pulse width t1 before update. Next, when the output of the normal position signal is updated and a change occurs in the XOR signal, the sum of the pulse width t2 calculated at that time and the pulse width t1 before the update corresponds to an electrical angle of 180 °. As a result, by calculating the electrical angle and angular velocity of the next electrical angle of 60 °, the angular velocity and electrical angle can be updated four times per 360 ° of electrical angle, and the electrical angle and angular velocity can be changed even when the angular velocity changes drastically. Can improve the calculation accuracy.
Specifically, the sum of the normally calculated time t1 before the update and the time t2 from when the abnormal position signal output is input and then the normal signal is input from another position detection circuit is 0 °. The angular velocity ωr (180) from the next angle 180 ° to 240 ° is expressed by Expression (4).
ωr (180) = 2π × [1 / (t1 + t2) × 2] (4)

Similarly, the sum of the time t4 calculated from the next normal signal and the time t5 until the normal signal is input again from another position detection circuit after the abnormal position signal output is input again is also the same. Since this corresponds to the time required for 180 ° rotation from 180 ° to 360 °, the angular velocity ωr (0) from the next angle 0 ° to 60 ° is expressed by equation (5).
ωr (0) = 2π × [1 / (t4 + t5) × 2] (5)

  In addition, what put together the calculation formula of these angular velocities for every angle of 60 degrees is shown in the column of the angular velocity of the lower table of FIG. The other columns in the lower table of FIG. 6 are the same as those in the lower table of FIG.

  In the diagram showing the waveform for every 60 ° of the calculation result of the angular velocity in FIG. 4, the characteristic indicated as Example 2 is the angular velocity calculation characteristic in this example. In FIG. 4, it can be seen that in this embodiment, although the angular velocity error slightly increases compared to the first embodiment, the calculation accuracy is better than that of the conventional method.

  FIG. 5C shows the angle calculation error in the present embodiment in FIG. 5 which shows the error of the calculation result of the electrical angle and the timing of the angle update. In FIG. 5, in this embodiment, the calculation accuracy is better than that in the conventional method in FIG. 5A, and calculation with less error is possible at the time of sudden change in angular velocity than in the first embodiment in FIG.

  As described above, the present embodiment is generated from the motor for driving the mechanical device, the inverter circuit for driving the motor, the plurality of position sensors for detecting the position of the rotor of the motor, and the position sensor. In the motor with a position sensor, the control device updates the electric angle and angular velocity of the motor from the elapsed time of the pulse width calculated from the exclusive OR of the signals to be controlled, and controls the output of the inverter circuit. Among the multiple position sensors, when the signal from one position sensor is not input normally during motor operation, the elapsed time before update and the previous change when the signal from another position sensor changes The electrical angle and the angular velocity are calculated using the sum of the elapsed time of the pulse width from the current time to the current time.

  The motor is a three-phase motor and has three position sensors. The control device normally inputs a signal from one of the position sensors during operation of the motor. If not, the sum of the elapsed time before update and the elapsed time of the pulse width from the previous change to the current change when the signal from another position sensor changes is calculated as an electrical angle of 180 °. Next, the electric angle and the angular velocity until the position sensor signal changes are calculated.

  As described above, according to this embodiment, even if the position sensor fails, the electric angle and angular velocity of the motor are calculated by using both the normal position sensor input signal and the abnormal position sensor input signal. As a result, the calculation accuracy of the angular velocity of the motor can be increased, and the motor can continue to operate safely. In addition, it is possible to provide a motor with a position sensor using a calculation method that increases calculation accuracy, and a gas compression device that can suppress rotation pulsation and prevent efficiency reduction and stoppage.

  Depending on the application of the gas compressor, when the tank capacity is limited as in the portable type, etc., the compressed air is generally compressed to a pressure higher than the pressure actually used and the compressed air is stored. . In this case, as the pressure of the gas compressor increases, the reaction force due to the pressure in the tank may cause a stall in the compressed air discharge stage near the top dead center, and the rotational speed fluctuation of the motor may increase. At this time, if an abnormal signal is output from the position detection circuit, the motor may stop when the allowable value for correction by the angular velocity calculation is exceeded.

  Therefore, in this embodiment, as shown in FIG. 7, when the control device determines that an abnormality has occurred in the position detection circuit, the pressure P_stop_fail is lower than the normal stop pressure P_stop of the gas compression device. Is newly set. Of course, this value is higher than the operating pressure range, so there is no problem in actual use, and when this value is exceeded, it can be safely stopped by stopping operation. Become. In addition, the rotational pulsation can be reduced.

  When the compressed air is used and the pressure in the tank decreases, the compressed air is stored again by starting the compression operation again. In general, the restart pressure at this time can ensure sufficient compressed air. If the pressure is set to a relatively high value and an abnormal signal is output from the position detection circuit in this situation, the motor may not be able to start if the allowable value for correction by the angular velocity calculation is exceeded. .

  Therefore, in this embodiment, as shown in FIG. 7, when it is determined that an abnormality has occurred in the position detection circuit, a pressure P_restart_fail that is lower than the restart pressure P_restart of the gas compression device at the normal time is newly set. Set to. Of course, this value is higher than the operating pressure range, so restarting the operation when the value falls below this value allows the compressor to be restarted safely at a pressure that does not cause problems in actual use. Is possible.

  Further, the restart pressure P_restart_fail may be set in combination with P_stop_fail, either of which may be a fixed value, or may be calculated as a variable value by a microcomputer in accordance with the operation state of the gas compression apparatus. Information recorded in the external storage device may be used.

  Some gas compression devices are designed to quickly fill the tank with compressed air, so the gas compression device is designed to run by rotating the motor at a high speed, and the target is relatively fast. An angular velocity wr_max is set. However, when the gas compression device is operating at high speed, the pulsation of the angular velocity of the motor tends to increase according to the pressure, and if an abnormal signal is output from the position detection circuit, an allowable value for correction by the angular velocity calculation If this value is exceeded, the motor may stop or the efficiency of the motor may deteriorate.

  Therefore, in this embodiment, as shown in FIG. 8, when it is determined that an abnormality has occurred in the position detection circuit, the target angular velocity at the time of abnormality that is lower than the target angular velocity wr_max of the gas compression device at the time of normal operation. A new wr_max_fail is set to suppress the maximum motor speed. As a result, it is possible to operate the gas compression device while reducing the pulsation of the angular velocity of the motor while storing the pressure that does not cause a problem in actual use in the tank.

In the embodiments described so far, the angular velocity of the motor is calculated on the basis of normal XOR signals such as t1 and t4, and the signal times t2 and t5 at the time of abnormality are approximately twice t1 and t4. In a case where the amount of air stored is a sufficient amount for actual use, as shown in FIG. 8, the target angular velocity of the motor is lower than the target angular velocity wr_max at normal time and By setting the constant target angular velocity wr_max_fconst at the time of abnormality, it is possible to minimize the error in the angular velocity calculation of the motor. At this time, the XOR signal times t1, t2, t4, and t5 of the position detection circuit are expressed by Expression (6).
t1 = t4 = t2 / 2 = t5 / 2 (6)

  Although these are described as fixed values, even if they are calculated as variable values by the microcomputer in accordance with the operation status of the compression device, they can be changed using information recorded in an external storage device such as an EEPROM. Furthermore, it may be used in combination with any one or a plurality of Embodiments 3 to 5 described above.

  Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and includes various modifications. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

1: Power supply 2: Control device 3: Rectifier circuit 4: Inverter circuit 7: Microcomputer 8: Memory circuit 9: Motor 10: Compressor body 11: Position detection circuit 12: Pressure sensor 13: Tank 14: Check valve 15: Regulator 16: Piping 17: Current detection circuit 18: Power factor correction circuit (PFC)
19: Output signal (Up, Un, Vp, Vn, Wp, Wn)
20: Position signal (HU, HV, HW)
401: Power element

Claims (7)

A motor for driving the mechanical device;
An inverter circuit for driving the motor;
A plurality of position sensors for detecting the position of the rotor of the motor;
A motor with a position sensor comprising: a control device that updates an electrical angle and an angular velocity of the motor from an elapsed time of a pulse width calculated from an exclusive OR of signals generated from the position sensor and controls an output of the inverter circuit. Have
A compressor body that is driven by the motor with the position sensor and compresses gas to generate compressed gas;
A gas compression device having a pressure sensor for measuring the pressure of the compressed gas,
The control device calculates the angular velocity of the motor from the elapsed time before the update when a position sensor abnormality is not normally input during operation of the motor among the plurality of position sensors. , Calculating the electrical angle and angular velocity using the elapsed time of the pulse width from the previous change to the current change when the signal from another position sensor changes ,
Furthermore, the at the time of the position sensor abnormality, the control unit by a gas compression apparatus and controls the output of the inverter circuit so as to stop at a lower pressure than the stop pressure to stop the normal time of the motor. A motor for driving the mechanical device;
An inverter circuit for driving the motor;
A plurality of position sensors for detecting the position of the rotor of the motor;
A motor with a position sensor comprising: a control device that updates an electrical angle and an angular velocity of the motor from an elapsed time of a pulse width calculated from an exclusive OR of signals generated from the position sensor and controls an output of the inverter circuit. Have
A compressor body that is driven by the motor with the position sensor and compresses gas to generate compressed gas;
A gas compression device having a pressure sensor for measuring the pressure of the compressed gas,
The control device calculates the angular velocity of the motor from the elapsed time before the update when a position sensor abnormality is not normally input during operation of the motor among the plurality of position sensors, When the signal from another position sensor changes, the electrical angle and angular velocity are calculated using the elapsed time of the pulse width from the previous change to the current change,
Further, when the position sensor is abnormal, the control device controls the output of the inverter circuit so that the motor is started after the pressure becomes lower than the restart pressure for restarting the motor at the normal time. Gas compression device . The gas compression device according to claim 1,
Said position sensor is abnormal, gas, characterized in that by the control device, which controls the output of the inverter circuit so as to start from when a pressure lower than the restart pressure operated again normally when the motor Compression device . A motor for driving the mechanical device;
An inverter circuit for driving the motor;
A plurality of position sensors for detecting the position of the rotor of the motor;
A motor with a position sensor comprising: a control device that updates an electrical angle and an angular velocity of the motor from an elapsed time of a pulse width calculated from an exclusive OR of signals generated from the position sensor and controls an output of the inverter circuit. Have
A compressor body that is driven by the motor with the position sensor and compresses gas to generate compressed gas;
A gas compression device having a pressure sensor for measuring the pressure of the compressed gas,
The control device calculates the angular velocity of the motor from the elapsed time before the update when a position sensor abnormality is not normally input during operation of the motor among the plurality of position sensors, When the signal from another position sensor changes, the electrical angle and angular velocity are calculated using the elapsed time of the pulse width from the previous change to the current change,
Furthermore, when the position sensor is abnormal, the control device controls the output of the inverter circuit so as to rotate at an angular velocity slower than the normal angular velocity of the motor . The gas compression device according to any one of claims 1 to 3,
When the position sensor is abnormal, an output of the inverter circuit is controlled by the control device so as to rotate at an angular velocity slower than a normal angular velocity of the motor . A motor for driving the mechanical device;
An inverter circuit for driving the motor;
A plurality of position sensors for detecting the position of the rotor of the motor;
A motor with a position sensor comprising: a control device that updates an electrical angle and an angular velocity of the motor from an elapsed time of a pulse width calculated from an exclusive OR of signals generated from the position sensor and controls an output of the inverter circuit. Have
A compressor body that is driven by the motor with the position sensor and compresses gas to generate compressed gas;
A gas compression device having a pressure sensor for measuring the pressure of the compressed gas,
The control device calculates the angular velocity of the motor from the elapsed time before the update when a position sensor abnormality is not normally input during operation of the motor among the plurality of position sensors, When the signal from another position sensor changes, the electrical angle and angular velocity are calculated using the elapsed time of the pulse width from the previous change to the current change,
Furthermore, when the position sensor is abnormal, the control device controls the output of the inverter circuit so that the angular velocity of the motor is always constant . The gas compression device according to any one of claims 1 to 5 ,
When the position sensor is abnormal, the control device controls the output of the inverter circuit so that the angular velocity of the motor is always constant .

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