CN110221207A - A kind of device and method for testing PG motor feedback circuit - Google Patents
A kind of device and method for testing PG motor feedback circuit Download PDFInfo
- Publication number
- CN110221207A CN110221207A CN201910590484.2A CN201910590484A CN110221207A CN 110221207 A CN110221207 A CN 110221207A CN 201910590484 A CN201910590484 A CN 201910590484A CN 110221207 A CN110221207 A CN 110221207A
- Authority
- CN
- China
- Prior art keywords
- feedback circuit
- voltage
- motor
- terminal
- motor feedback
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 17
- 230000006641 stabilisation Effects 0.000 claims description 13
- 238000011105 stabilization Methods 0.000 claims description 13
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The present invention provides a kind of device and methods for testing PG motor feedback circuit, and the device of above-mentioned test PG motor feedback circuit includes: power module, for providing operating voltage required for PG motor feedback circuit；Link block comprising the connecting wire for being connected with PG motor to be measured；Display module, the tach signal sent for receiving the PG motor feedback circuit, and shown.The present invention solves the problems, such as that existing equipment is not only not easy to carry but also expensive and function is far longer than needs and forms waste.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a device and a method for testing a PG motor feedback circuit.
Background
The PG motor is a motor with a hall element, the rotating speed of the motor can be determined by using an output signal of the hall element, and the PG motor is widely applied to various air conditioning units because the rotating speed of the PG motor is not influenced by the load change of an air conditioner and the change of a power supply voltage and the control precision is high.
The feedback circuit of the PG motor is likely to be defective in mass production. Among various adverse symptoms of the PG motor, the failure of the feedback circuit accounts for a large adverse proportion, so the feedback circuit needs to be heavily detected. The existing detection equipment comprises a control chip, a speed regulation module, an alarm system and a high-low voltage protection system, and the whole detection equipment is expensive and difficult to carry. In addition, when the PG motor feedback circuit is individually inspected completely before the PG motor is assembled to the home appliance in a home appliance assembly factory, a plurality of expensive devices are required to be configured, which results in redundant functions and waste.
It can be seen that a need exists for a low cost apparatus that can quickly detect a feedback circuit.
Disclosure of Invention
The invention provides a device and a method for testing a feedback circuit of a PG motor, which aim to solve the problems that the existing equipment is not easy to carry and expensive, and the function is far greater than the requirement to cause waste.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
according to an aspect of the present invention, there is provided an apparatus for testing a feedback circuit of a PG motor, comprising:
the power supply module is used for providing working voltage required by the feedback circuit of the PG motor;
the connecting module comprises a connecting lead for connecting with the PG motor to be tested;
and the display module is used for receiving the rotating speed signal sent by the PG motor feedback circuit and displaying the rotating speed signal.
The test device provided by the invention is low in cost, convenient to carry and capable of rapidly detecting the feedback circuit of the PG motor.
In some embodiments of the invention, the connection module further comprises:
a terminal (3) which is used in cooperation with a terminal used by a feedback circuit of the PG motor; wherein,
the terminals respectively transmit the voltage and current output by the power supply module to the PG motor feedback circuit and the rotating speed signal sent to the display module by the PG electrode feedback circuit through a plurality of pins.
The terminal can prevent wrong wire insertion and reduce the number of wire insertion.
In some embodiments of the invention, a power module comprises:
dry batteries;
and the three-terminal voltage stabilizing block is used for stabilizing the voltage of the dry battery, so that the output voltage of the power supply module is matched with the working voltage required by the PG motor feedback circuit.
After the voltage of the dry battery passes through the three-terminal voltage stabilizing block, the working voltage required by the feedback circuit of the PG motor can be output, the condition that different power supplies are required to be provided for different PG motor feedback circuits for adaptation is avoided, and the use universality of the testing device is improved.
In some embodiments of the invention, the Vin port of the three-terminal voltage stabilizing block is connected with the anode of the dry battery;
the GND port of the three-terminal voltage stabilization block is connected with the negative electrode of the dry battery and the voltage negative electrode of the terminal, and the GND port is also connected with the signal end of the terminal after being connected with the display module;
the Vout port of the three-terminal voltage-stabilizing block is connected with the voltage anode of the terminal.
In some embodiments of the invention, the display module comprises an LED.
In some embodiments of the present invention, the LED is of a type that uses a voltage drop value of less than 5V and an operating current of less than 20 mA.
In some embodiments of the present invention, the display module further comprises a current limiting resistor in series with the LED, wherein,
the resistance R of the current limiting resistor is as follows: r ═ U1-U2)/I;
u1 is the level output by the signal line of the PG motor feedback circuit, U2 is the voltage drop value of the LED, and I is the working current of the LED;
the power of the current limiting resistor is greater than (I x U2). The resistor R defined by the method can ensure the long-term normal work of the LED.
According to another aspect of the present invention, there is also provided a test method of the test apparatus as described above, including the steps of:
s1, connecting the PG motor feedback circuit to the corresponding position of the device, and supplying power to the PG motor feedback circuit by the power supply module;
and S2, manually rotating the rotor of the PG motor, intermittently outputting voltage by the PG motor feedback circuit when the rotor rotates, displaying the voltage through the display module, and judging whether the PG motor feedback circuit is normal or not according to the display result.
In some embodiments of the present invention, in step S1, the terminals of the PG motor feedback circuit are connected to the terminals of the device in a matching manner, and the terminals are used to perform centralized control on the voltage and current sent by the power module to the PG motor feedback circuit and the circuit of the rotation speed signal sent by the PG electrode feedback circuit to the display module.
In some embodiments of the present invention, in step S1, the three-terminal voltage regulator block is used to process the voltage of the dry cell, and output the working voltage required by the feedback circuit of the PG motor.
In some embodiments of the present invention, in step S2, the rotation speed signal sent by the PG electrode feedback circuit is displayed by an LED, the LED is connected between the signal line of the PG electrode feedback circuit and the ground, a voltage is applied to the LED, and if the LED is intermittently lit, the PG electrode feedback circuit is displayed to be working normally and not damaged.
Drawings
Fig. 1 shows a schematic structural diagram of a testing apparatus in an embodiment of the present invention.
FIG. 2 shows a step diagram of a test method in an embodiment of the invention.
Description of reference numerals:
1-a power supply; 2-a three-terminal voltage stabilization block; 3-a terminal; 31-voltage positive pole; 32-voltage negative pole; 33-signal terminal; 4-an LED; 5-current limiting resistor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In an embodiment of the present invention, a testing apparatus for a feedback circuit of a PG motor is provided, as shown in fig. 1, including: dry battery 1, three-terminal regulator block 2, terminal 3, LED4 and current-limiting resistor 5.
The dry battery 1 and the three-terminal voltage-stabilizing block 2 are combined into a power module for providing the voltage required by the feedback circuit of the PG motor. The voltage of the dry battery 1 is output as stable voltage after passing through the three-terminal voltage stabilizing block 2, namely, the voltage of the dry battery 1 is processed by the three-terminal voltage stabilizing block 2 according to different working voltages required by different PG motor feedback circuits, so that the working voltage required by the PG motor feedback circuits can be output, different power supplies are prevented from being provided for different PG motor feedback circuits to adapt, and the use universality of the testing device is improved.
The three-terminal regulator block 2 has three ports, which are a Vin port, a Vout port and a GND port. The positive pole of the dry battery 1 is connected with the Vin port, the negative pole of the dry battery 1 is connected with the GND port, thus, the voltage of the dry battery 1 is between the Vin port and the GND port, and the stabilized voltage of the dry battery 1 after being stabilized by the three-terminal voltage stabilizing block 2 is between the Vout port and the GND port. The output voltage of the three-terminal voltage stabilization block 2 is matched with the voltage required by the feedback circuit of the PG motor, for example, if the working voltage of the feedback circuit of the PG motor is 5V, the three-terminal voltage stabilization block 7805 is selected; if the PG motor feedback circuit operating voltage is 9V, the three terminal regulator block 7809 should be selected.
And the terminal 3 and a connecting wire for connecting with the PG motor to be tested are taken as a connecting module. And the terminal 3 is matched with a terminal used by a feedback circuit of the PG motor for use. The terminal 3 transfers the voltage and current output by the power module to the PG motor feedback circuit and the rotating speed signal sent by the PG electrode feedback circuit to the display module through a plurality of pins.
The LED4 and the current-limiting resistor 5 are combined to form a display module for receiving and displaying the rotating speed signal sent by the PG electrode feedback circuit. Specifically, the terminal 3 is a three-core terminal, and includes a voltage positive electrode 31, a voltage negative electrode 32 and a signal terminal 33, which respectively correspond to the power input terminal, the power output terminal and the signal output terminal of the feedback circuit of the PG motor. The voltage anode 31 is connected with a Vout port of the three-terminal voltage stabilization block 2, the voltage cathode 32 is connected with a GND port of the three-terminal voltage stabilization block 2, the signal end 33 is connected with an LED4, the LED4 is connected with a current-limiting resistor 5 in series, and the current-limiting resistor 5 is connected with the GND port of the three-terminal voltage stabilization block 2. Of course, the positions of the LED4 and the current limiting resistor 5 may be interchanged, that is, the signal terminal 33 is connected to the current limiting resistor 5, the LED4 is connected in series to the current limiting resistor 5, and the LED4 is connected to the GND port of the three-terminal voltage regulator block 2. And the voltage output between the Vout port and the GND port is used as the working voltage of the feedback circuit of the PG motor.
The PG motor feedback circuit is provided with three lines, namely a power line, a ground line and a signal line of the output level of the PG motor feedback circuit, wherein the power line, the ground line and the signal line are respectively connected to a power line interface, a ground line interface and a signal line interface of a terminal. The terminal 3 is matched with a terminal used by a PG motor feedback circuit for use, and the line sequence corresponds to a terminal pin used by the PG motor feedback circuit. One of the terminals 3 and the PG motor feedback circuit terminal is a male terminal, the other terminal is a female terminal, a pin is arranged on the male terminal, a jack is arranged on the female terminal, and the pin is inserted into the jack to realize the circuit connection.
When the three-terminal voltage stabilizing block works, current flows into a power line of a PG motor feedback circuit from the positive electrode of output voltage of the three-terminal voltage stabilizing block 2 through power line interfaces of two terminals, and flows back to the negative electrode of the output voltage of the three-terminal voltage stabilizing block 2 from a ground wire of the PG motor feedback circuit through ground line interfaces of the two terminals, and when a signal is output from the PG motor feedback circuit, the current flows into an LED4 and a current limiting resistor 5 from the PG motor feedback circuit through signal line interfaces of the two terminals, and flows back to the negative electrode of the output voltage of the three-terminal voltage stabilizing block 2 after passing through the LED 4. Through the terminal 3, the power input end of the feedback circuit of the PG motor is connected with the Vout port, the power output end of the feedback circuit of the PG motor is connected with the GND port, and the signal output end of the feedback circuit of the PG motor is connected with the LED4, so that the required voltage is provided for the feedback circuit of the PG motor, and meanwhile, the LED4 is periodically lightened to display a level signal output by the feedback circuit of the PG motor. It should be noted that the voltage and current direction includes two loops, one is that the ground wire interface of the terminal is connected to the output voltage cathode of the three-terminal voltage stabilization block 2, and the other is that the signal wire interface of the terminal is connected to the output voltage cathode of the three-terminal voltage stabilization block 2 after passing through the LED4 and the current-limiting resistor 5, and the two loops are not interfered with each other.
The use of the terminal 3 can prevent the insertion of wrong wires, of course, the terminal 3 is not necessary to be used, if the terminal 3 is not used, a power supply wire is connected to the positive electrode (Vout port) of the output voltage of the three-terminal voltage stabilizing block 2, a ground wire is connected to the negative electrode (GND port) of the output voltage of the three-terminal voltage stabilizing block 2, and a signal wire of the output level of the PG motor feedback circuit is connected to a circuit formed by connecting the LED4 and the current limiting resistor 5 in series and then connected to the negative electrode (GND port) of the output voltage of the. In contrast, three terminals are required to be arranged to be connected with a power line interface, a ground line interface and a signal line interface of the terminal used by the feedback circuit of the PG motor respectively, so that the number of wire plugging times is increased, and the process is complicated.
In a specific embodiment, the voltage of the dry battery 1 is greater than the working voltage of the feedback circuit of the PG motor, and the limit input voltage of the three-terminal voltage stabilizing block 2 is not exceeded.
The LED4 is preferably, but not limited to, a model with a voltage drop value less than 5V and an operating current less than 20mA for displaying the level signal output from the signal line of the feedback circuit of the PG motor.
The current limiting resistor 5 is used for limiting the current of the LED4 and preventing the LED4 from being burnt by large current. The level output by the signal output end of the PG motor feedback circuit is U1, the voltage drop value of the LED4 is U2, the working current of the LED4 is I, the resistance of the current limiting resistor 5 is R, and then R is (U1-U2)/I; its power needs to be greater than (I × U2). If the resistance of the current-limiting resistor is too small or not, the LED4 will be burnt by the voltage and current output by the feedback circuit of the PG motor, and if the resistance of the current-limiting resistor is too large, the LED will not be lighted, and the resistor defined by the above formula is used for enabling the LED4 to normally work for a long time.
It should be noted that the three-terminal voltage regulator block 2 is not necessary, and when the three-terminal voltage regulator block 2 is not used, the voltage of the dry battery 1 must be equal to the working voltage of the PG motor feedback circuit, and since the voltage of the dry battery 1 is fixed, the testing device can only be applied to the PG motor feedback circuit with the working voltage being the voltage value of the dry battery 1.
When the three-terminal voltage stabilizing block 2 is not used, the voltage anode 31 of the terminal 3 is connected with the anode of the dry battery 1, the voltage cathode 32 of the terminal 3 is connected with the cathode of the dry battery 1, the signal end 33 of the terminal 3 is connected with the LED4, the LED4 is connected with the current limiting resistor 5 in series, and the current limiting resistor 5 is connected with the cathode of the dry battery 1. Of course, the positions of the LED4 and the current limiting resistor 5 can be interchanged, that is, the signal terminal 33 is connected with the current limiting resistor 5, the LED4 is connected in series with the current limiting resistor 5, and the LED4 is connected with the negative electrode of the dry battery 1. The voltage output by the dry battery 1 is used as the working voltage of the feedback circuit of the PG motor.
When the three-terminal voltage-stabilizing block 2 and the terminal 3 are not used, the power line of the PG motor feedback circuit is connected with the anode of the dry battery 1, the ground wire of the PG motor feedback circuit is connected with the cathode of the dry battery 1, and the signal wire of the output level of the PG motor feedback circuit is connected with the circuit formed by connecting the LED4 and the current-limiting resistor 5 in series and then connected with the cathode of the dry battery 1.
Compared with the prior art, the testing device of the invention cancels all unnecessary components for testing the PG motor feedback circuit, reduces the cost and is convenient to carry; meanwhile, the invention also solves the problems that the existing equipment is not easy to carry and expensive, and the function is far greater than the requirement to cause waste. In addition, the dry battery is used as a power supply, so that the potential electrical safety hazard caused by high voltage is avoided.
In an embodiment of the present invention, a method for testing a feedback circuit of a PG motor is further provided, as shown in fig. 2, including the following steps:
s1, connecting the terminal of the PG motor feedback circuit to the terminal 3 of the testing device, manually rotating the rotor of the PG motor, and supplying power to the PG motor feedback circuit by the power module;
s2, when the rotor rotates, the PG motor feedback circuit outputs voltage intermittently through the signal line, the LED4 and the current limiting resistor 5 are connected between the signal line and the ground, the voltage is applied to the LED4 and the current limiting resistor 5, the LED4 is lightened when being electrified and is extinguished when being powered off; if the LED4 is periodically lighted, the feedback circuit of the PG motor is displayed to work normally and is not damaged; otherwise, the feedback circuit of the PG motor works abnormally.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. An apparatus for testing a feedback circuit of a PG motor, comprising:
the power supply module is used for providing working voltage required by the feedback circuit of the PG motor;
the connecting module comprises a connecting lead for connecting with the PG motor to be tested;
and the display module is used for receiving the rotating speed signal sent by the PG motor feedback circuit and displaying the rotating speed signal.
2. The apparatus of claim 1, wherein the connection module further comprises:
a terminal (3) which is used in cooperation with a terminal used by the feedback circuit of the PG motor; wherein,
and the terminal (3) respectively transfers the voltage and current output by the power supply module to the PG motor feedback circuit and the rotating speed signal sent to the display module by the PG electrode feedback circuit through a plurality of pins.
3. The apparatus of claim 2, wherein the power module comprises:
a dry battery (1);
and the three-end voltage stabilization block (2) is used for performing voltage stabilization treatment on the voltage of the dry battery (1) so that the output voltage of the power supply module is matched with the working voltage required by the PG motor feedback circuit.
4. The apparatus of claim 3,
a Vin port of the three-terminal voltage stabilization block (2) is connected with the anode of the dry battery (1);
a GND port of the three-terminal voltage stabilization block (2) is connected with a negative electrode of the dry battery (1) and a voltage negative electrode (32) of the terminal (3), and the GND port is also connected with the display module and then connected with a signal end (33) of the terminal (3);
and the Vout port of the three-terminal voltage stabilizing block (2) is connected with the voltage anode (31) of the terminal (3).
5. The device according to claim 1, characterized in that the display module comprises LEDs (4).
6. A method for testing a feedback circuit of a PG motor is characterized by comprising the following steps:
s1, connecting the PG motor feedback circuit to the corresponding position of the device as claimed in claim 1, wherein the power supply module supplies power to the PG motor feedback circuit;
and S2, manually rotating the rotor of the PG motor, intermittently outputting voltage by the PG motor feedback circuit when the rotor rotates, displaying the voltage through a display module, and judging whether the PG motor feedback circuit is normal or not according to a display result.
7. The method according to claim 6, wherein in step S1, the terminals of the PG motor feedback circuit are connected to the terminals (3) of the device in a matched manner, and the terminals are used to perform centralized control of the circuits of the voltage and current sent by the power module to the PG motor feedback circuit and the rotation speed signal sent by the PG electrode feedback circuit to the display module.
8. The method according to claim 6 or 7, wherein in step S1, the voltage of the dry cell battery (1) is processed by a three-terminal voltage stabilizing block (2) to output the required working voltage of the PG motor feedback circuit.
9. The method according to claim 6, wherein in step S2, the rotation speed signal sent by the PG electrode feedback circuit is displayed by an LED (4), the LED (4) is connected between the signal line of the PG electrode feedback circuit and the ground, a voltage is applied to the LED (4), and if the LED (4) is intermittently lighted, the PG motor feedback circuit is displayed to be working normally and not damaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590484.2A CN110221207A (en) | 2019-07-02 | 2019-07-02 | A kind of device and method for testing PG motor feedback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590484.2A CN110221207A (en) | 2019-07-02 | 2019-07-02 | A kind of device and method for testing PG motor feedback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110221207A true CN110221207A (en) | 2019-09-10 |
Family
ID=67815662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910590484.2A Pending CN110221207A (en) | 2019-07-02 | 2019-07-02 | A kind of device and method for testing PG motor feedback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110221207A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040138837A1 (en) * | 2000-07-13 | 2004-07-15 | Shuichi Fujii | Method of measuring motor constant for induction motor |
| CN201188107Y (en) * | 2008-04-11 | 2009-01-28 | 宁波海诚电器有限公司 | Apparatus for measuring air conditioner PG motor rotational speed |
| CN101762787A (en) * | 2010-01-04 | 2010-06-30 | 宁波海诚电器有限公司 | Tester of program guidance (PG) motor |
| CN202102006U (en) * | 2010-12-23 | 2012-01-04 | 美的集团武汉制冷设备有限公司 | Device for measuring rotating speed of air conditioner fan |
| CN103376408A (en) * | 2012-04-18 | 2013-10-30 | 珠海格力电器股份有限公司 | Test system and test method of PG motor |
| CN203443969U (en) * | 2013-08-27 | 2014-02-19 | 广东科龙空调器有限公司 | Rotating speed testing apparatus for air-conditioning fan motor |
| CN103645338A (en) * | 2013-12-14 | 2014-03-19 | 广东志高空调有限公司 | Air-conditioning PG tachymeter |
| CN203929948U (en) * | 2014-07-01 | 2014-11-05 | 珠海格力电器股份有限公司 | Detection apparatus for unusual protection fault of motor feedback of air conditioner |
| CN105068001A (en) * | 2015-07-31 | 2015-11-18 | 佛山市中格威电子有限公司 | Motor test tooling |
| CN105068005A (en) * | 2015-09-29 | 2015-11-18 | 格力电器（武汉）有限公司 | Detection system and detection method of PG motor |
| CN206990773U (en) * | 2017-06-30 | 2018-02-09 | 无锡吉兴汽车声学部件科技有限公司 | A kind of detection means for testing power module working condition |
| CN210572628U (en) * | 2019-07-02 | 2020-05-19 | 宁波奥克斯电气股份有限公司 | Device for testing feedback circuit of PG motor |
-
2019
- 2019-07-02 CN CN201910590484.2A patent/CN110221207A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040138837A1 (en) * | 2000-07-13 | 2004-07-15 | Shuichi Fujii | Method of measuring motor constant for induction motor |
| CN201188107Y (en) * | 2008-04-11 | 2009-01-28 | 宁波海诚电器有限公司 | Apparatus for measuring air conditioner PG motor rotational speed |
| CN101762787A (en) * | 2010-01-04 | 2010-06-30 | 宁波海诚电器有限公司 | Tester of program guidance (PG) motor |
| CN202102006U (en) * | 2010-12-23 | 2012-01-04 | 美的集团武汉制冷设备有限公司 | Device for measuring rotating speed of air conditioner fan |
| CN103376408A (en) * | 2012-04-18 | 2013-10-30 | 珠海格力电器股份有限公司 | Test system and test method of PG motor |
| CN203443969U (en) * | 2013-08-27 | 2014-02-19 | 广东科龙空调器有限公司 | Rotating speed testing apparatus for air-conditioning fan motor |
| CN103645338A (en) * | 2013-12-14 | 2014-03-19 | 广东志高空调有限公司 | Air-conditioning PG tachymeter |
| CN203929948U (en) * | 2014-07-01 | 2014-11-05 | 珠海格力电器股份有限公司 | Detection apparatus for unusual protection fault of motor feedback of air conditioner |
| CN105068001A (en) * | 2015-07-31 | 2015-11-18 | 佛山市中格威电子有限公司 | Motor test tooling |
| CN105068005A (en) * | 2015-09-29 | 2015-11-18 | 格力电器（武汉）有限公司 | Detection system and detection method of PG motor |
| CN206990773U (en) * | 2017-06-30 | 2018-02-09 | 无锡吉兴汽车声学部件科技有限公司 | A kind of detection means for testing power module working condition |
| CN210572628U (en) * | 2019-07-02 | 2020-05-19 | 宁波奥克斯电气股份有限公司 | Device for testing feedback circuit of PG motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211151975U (en) | Vehicle-mounted Ethernet testing device | |
| CN106997007B (en) | Insulation resistance measuring device and method for electric automobile direct-current high-voltage system | |
| CN206400035U (en) | Pre-charging resistor protection circuit and automobile | |
| CN107861015B (en) | BMS wiring detection device and method | |
| CN201278011Y (en) | Electric power socket tester | |
| CN110905733A (en) | Become oar cabinet test system | |
| CN203299316U (en) | Line sequence detector | |
| CN210572628U (en) | Device for testing feedback circuit of PG motor | |
| CN110673054B (en) | DC/DC power supply test system and aging test method of DC/DC power supply | |
| JP6502289B2 (en) | Connection confirmation tester and connection confirmation test method | |
| CN108132445B (en) | Detection device of linear power supply | |
| CN106556771B (en) | A kind of priming system circuitry self test survey method | |
| CN110221207A (en) | A kind of device and method for testing PG motor feedback circuit | |
| CN205643583U (en) | Test wire rod detecting instrument | |
| CN210119553U (en) | Detection apparatus for whether short circuit exists between each pin of DB plug | |
| CN218585226U (en) | Shelter power station switch board detection device | |
| JP2001337125A (en) | Tester for serial connection type battery | |
| US11913978B2 (en) | Wireless voltage measurement, testing and analytics system | |
| CN106291320B (en) | USB charging port control chip detection circuit | |
| CN214427480U (en) | Multi-path voltage detection circuit and test fixture | |
| CN207908960U (en) | A kind of analogue load circuit of compatible 12V and 24V automobile power supply systems | |
| CN209764982U (en) | connector plugging detection device and hardware-in-the-loop test equipment | |
| KR101056723B1 (en) | Aging test device for portable phone charger or switching mode power supply | |
| CN220490940U (en) | Test circuit and system | |
| CN215340829U (en) | Temperature controller test fixture based on relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |