TWI646319B - Adjustable nonlinear false load measuring system and method - Google Patents

Abstract

The invention relates to a controllable nonlinear false load measuring system, comprising a regulating device, a test object and a storage device, and uses the regulating device to measure the torsion force, the rotating speed and related performance parameters of the object to be tested, and store the measurement result in the measuring result. Inside the storage device. The control device comprises a data interception and control circuit, a harmonic generator, a load control circuit, a dummy load device, a power generator and a display device, and the data interception and control circuit is connected with the harmonic generator, the load control circuit, the dummy load device and the display device The load control circuit is connected to the dummy load device and the power generator. The power generator is further connected to an external object to be tested, and the display device is connected to an external storage device. To obtain different equivalent powers, form an adjustable output power, and measure the torque, speed value and other performance parameters of the object to be tested.

Description

Adjustable nonlinear false load measuring system and method

The invention relates to a controllable nonlinear false load measuring system and method, in particular to a data intercepting and controlling circuit as a control core, forming a closed loop negative feedback control loop, to obtain different equivalent powers, forming a continuously adjustable Output power, according to which the torque, speed value and other performance parameters of the object to be tested are measured.

In home appliances, lighting and industrial products and equipment, the application of non-linear loads is very common, such as: magnetrons for microwave ovens, induction coils for induction cookers, various gas discharge lamps, heating coils for induction heating, etc. In a wide range of input voltages or a wide range of load changes, if the constant voltage or constant current control method commonly used in power supplies is used, the input or output power is often not effectively controlled.

Therefore, in order to ensure that the system can maintain a stable energy output in any working state, constant power control has become the main control direction of nonlinear load applications.

Currently, the method of determining the power control is generally to detect the voltage signal and the current signal, and provide the two signals to a Micro-Controller Unit (MCU) or a Digital Signal Processor (DSP). Doing operations, because power calculations often use multiplication or more complex root-mean-square (RMS) operations, it will consume many computing resources of the microcontroller or digital signal processor, which will affect other Important work schedule.

Therefore, there is a need for a switch type of different power input sources and a continuously controllable nonlinear torque electronic load and dynamic energy measurement system design, which achieves excellent precision, stability and nonlinear dynamic response, and can be further combined with precise Software control for fast power measurement with accurate measurement accuracy.

The invention mainly provides a controllable nonlinear false load measuring system, comprising a regulating device, a test object and a storage device, wherein the adjusting device is used to measure the torsion, the rotational speed and the related performance parameters of the test object, and the measurement is performed. The result is stored in a storage device.

For example, the object to be tested may be an engine or a motor, and in addition, the storage device may be a memory or a memory card.

The control device comprises a data interception and control circuit, a harmonic generator, a load control circuit, a dummy load device, a power generator and a display device, wherein the data interception and control circuit is connected with a harmonic generator, a load control circuit, a dummy load device and A display device, the load control circuit is connected to the dummy load device and the power generator.

In addition, the power generator is further connected to an external object to be tested, and the display device is connected to an external storage device.

The overall operation of the present invention is that the harmonic generator generates a sawtooth wave to be transmitted to the data intercepting and control circuit, and the proportional integral differential operator operates the dummy load device to obtain the feedback voltage, and further compares the sawtooth wave and the feedback voltage to form and transmit the high frequency pulse width. Modulate the wave to the load control circuit.

In addition, the object to be tested drives the power generator to generate a sensing power source, and the power generator transmits the sensing power source to the load control circuit, and the load control circuit receives the high frequency pulse width modulation wave and the sensing power source through the internal error comparator. After adjustment, a dummy load power source is formed and transmitted to the dummy load device.

The dummy load device receives the dummy load power and consumes power, and forms a closed-loop negative feedback control loop with the data intercepting and control circuit and the load control circuit, so that the dummy load device forms different power values to obtain different equivalent powers. The continuously adjustable output power, and the output power is traced back to the object to be tested via the load control circuit and the power generator, and the torque, the rotational speed value and other performance parameters of the object to be tested are measured according to the measured quantity.

The invention is characterized in that the adjustable electronic load has excellent precision, stability and nonlinear dynamic response, and can be further combined with precise software control, thereby realizing rapid power supply measurement and accurate measurement accuracy.

The embodiments of the present invention will be described in more detail below with reference to the drawings and the reference numerals, which can be implemented by those skilled in the art after having studied this specification.

The present invention is a controllable nonlinear false load measurement system. As shown in FIG. 1 , the control device 10 includes a control device 10 , a test object 20 , and a storage device 30 . The control device 10 measures the torque of the test object 20 , The rotational speed and associated performance parameters are stored in the storage device 30.

For example, the object to be tested 20 may be various types of engines or various types of motors, such as a jet engine, a single stroke engine, a four-stroke engine, an AC-DC brushless motor, an AC motor, or a DC motor. Further, the storage device 30 may be a memory, Memory card, etc.

The control device 10 includes a data interception and control circuit 11, a harmonic generator 12, a load control circuit 13, a dummy load device 14, a power generator 15, and a display device 16. The data interception and control circuit 11 is connected to the harmonic generator 12, the load control circuit 13, the dummy load device 14, and the display device 16, and the load control circuit 13 is connected to the dummy load device 14 and the power generator 15.

In addition, the power generator 15 is further connected to the external object to be tested 20, and the display device 16 is connected to the external storage device 30.

The data interception and control circuit 11 may include a proportional integral derivative (PID) operator, and receive the sawtooth wave generated from the harmonic generator 12, and use the PID operator to calculate the dummy load device 14 to obtain the feedback voltage, and then perform the sawtooth wave with the sawtooth wave. In comparison, a high frequency pulse width modulation (PWM) wave is generated and transmitted.

The power generator 15 may include a motor controller, a torque shifting mechanism, a torsion push rod, and an inductive force receiving device. The power generator 15 is driven by the external object to be tested 20 and generates a sensing power source and simultaneously transmitted to the load control circuit 13 . .

The load control circuit 13 may include an error comparator that receives the PWM wave from the data intercepting and controlling circuit 11, and receives the sensing power from the power generator 15, and further adjusts the error comparator to generate and transmit a dummy load power. . For example, the load control circuit 13 can be executed by the microcontroller through the firmware or can be executed by the central processor through the software.

The dummy load device 14 receives the dummy load power from the load control circuit 13 and consumes power, and further forms a closed loop negative feedback control loop with the data interception and control circuit 11 and the load control circuit 13.

The display device 16 receives and displays the output power of the power generator 15 intercepted by the data intercepting and control circuit 11 and further transmits it to the external storage device 30 for storage.

In short, the overall operation of the present invention is that the harmonic generator 12 generates a sawtooth wave to be transmitted to the data intercepting and controlling circuit 11, while the PID operator operates the dummy load device 14 to generate a feedback voltage, which is compared with the control circuit 11 via the data intercepting and control circuit 11. The sawtooth wave and the feedback voltage form and transmit a PWM wave to the load control circuit 13. Further, the object to be tested 20 drives the power generator 15 to generate a sensing power source, and transmits the sensing power source to the load control circuit 13, and the load control circuit 13 receives the PWM wave. And sensing the power supply, passing the error comparator and adjusting, transmitting the dummy load power to the dummy load device 14 to form a closed loop negative feedback control loop, so that the dummy load device 14 forms different power values to obtain different equivalent powers. The continuously adjustable output power is formed, and the output power is traced back to the object to be tested 20 via the load control circuit 13 and the power generator 15, and the torque, the rotational speed value and other performance parameters of the object 20 are measured according to the measurement.

The invention can control the measurement method of the nonlinear dummy load, as shown in FIG. 2, which utilizes the data intercepting and control circuit, the proportional integral differential operator, the harmonic generator, the load control circuit, the error comparator, and the dummy. The system of the load device and the power generator measures the object to be tested, and includes a first step S1, a second step S2, and a third step S3.

In the first step S1, a high frequency pulse width modulation (PWM) wave is generated, the harmonic generator generates a sawtooth wave to be transmitted to the data intercepting and control circuit, and the proportional integral differential operator calculates the dummy load device to obtain a feedback voltage, and the data interception is performed. The sawtooth wave and the feedback voltage are compared with the control circuit to generate a high frequency pulse width modulated wave, which is sent to the load control circuit.

In the second step S2, a sensing power source is generated, and the power generator generates the sensing power source to be simultaneously transmitted to the load control circuit via the object to be tested.

In the third step S3, a dummy load power source is generated, and the load control circuit receives the high frequency pulse width modulation wave and the sensing power source, and is adjusted by the error comparator to generate a dummy load power source and transmitted to the dummy load device to form a closed loop negative feedback control. Loop.

Further, the first step S1 to the third step S3 are repeated such that the dummy load devices form different power values to obtain different equivalent powers to form a continuously adjustable output power, and the output power is further controlled by the load control circuit and the power. The generator traces back to the object to be tested to measure the performance parameters of the object to be tested.

The main feature of the present invention is that the present invention provides an energy measurement system for a controllable nonlinear false load that is simultaneously shared by a turbojet engine and an air motor for flight control. The overall system includes a motor, a motor controller, an electronic load controller, and a non- Linear dummy load, data interception system, specifically, the system is a switch type that can provide two different power input sources and can be continuously controlled nonlinear torque electronic load and dynamic energy measurement. So far, there is no similar measurement system in China. Design, especially for electronic loads.

The invention takes the data intercepting and control circuit as the control core, compares the sawtooth wave generated by the harmonic generator with the feedback voltage obtained by the proportional integral operation, generates the high frequency PWM wave control electronic load consumption control circuit, and then adjusts through the error comparator. It forms a closed-loop negative feedback control loop. In addition, the switch-type controllable electronic load has excellent accuracy, stability and nonlinear dynamic response, and can be further combined with precise software control to achieve fast power measurement with accurate measurement accuracy. .

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, and any modifications or alterations to the present invention made in the spirit of the same invention. All should still be included in the scope of the intention of the present invention.

10‧‧‧Control device

11‧‧‧Data interception and control circuit

12‧‧‧Harmonic Generator

13‧‧‧Load control circuit

14‧‧‧false load device

15‧‧‧Power generator

16‧‧‧ display device

20‧‧‧Test object

30‧‧‧Storage device

Figure 1 shows a schematic diagram of a controllable nonlinear dummy load measurement system of the present invention. Figure 2 is a flow chart showing the method for measuring the linear false load measurement of the present invention.

Claims (5)

A tunable nonlinear dummy load measuring system comprises: a regulating device comprising a data intercepting and controlling circuit, a harmonic generator, a load control circuit, a dummy load device, a power generator and a display device; The object to be tested is an engine or a motor; and a storage device; wherein the control device is connected to the object to be tested and the storage device, and the data intercepting and control circuit is connected to the harmonic generator, the load control circuit, and the a dummy load device and the display device, the load control circuit is connected to the dummy load device and the power generator, the power generator is connected to the external object to be tested, the display device is connected to the external storage device, and the data intercepting and controlling The circuit further includes a proportional integral derivative operator, the load control circuit including an error comparator, the harmonic generator generates a sawtooth wave to be transmitted to the data intercepting and controlling circuit, and the proportional integral derivative operator calculates the dummy load device to obtain a feedback voltage, the data interception and the control circuit compare the sawtooth wave and the feedback voltage to generate a high frequency The width modulation wave is sent to the load control circuit, and the test object drives the power generator, so that the power generator generates a sensing power source and transmits to the load control circuit, and the load control circuit receives the high The frequency pulse width modulation wave and the sensing power source are adjusted by the error comparator to form a dummy load power source, which is sent to the dummy load circuit to form a closed loop negative feedback control loop. The controllable nonlinear false load measuring system according to claim 1, wherein the motor is an AC/DC brushless motor, an AC motor or a DC motor, and the engine is an injection engine, a single stroke engine or a four-stroke engine. . The controllable nonlinear false load measuring system according to claim 1, wherein the power generator further comprises a motor controller, a torque shifting mechanism, a torsion push rod and an inductive force receiving device. The controllable nonlinear dummy load measuring system according to claim 1, wherein the load control circuit is a microcontroller or a central processing unit. A measuring method capable of regulating a nonlinear dummy load, comprising: a data intercepting and controlling circuit, a proportional integral differential operator, a harmonic generator, a load control circuit, an error comparator, a dummy load device and a The power generator system measures a test object, comprising: a first step of generating a high frequency pulse width modulation (PWM) wave, the harmonic generator generating a sawtooth wave to be transmitted to the data intercepting and controlling circuit, The proportional integral derivative operator calculates a feedback voltage of the dummy load device, and the data intercepting and comparing the sawtooth wave and the feedback voltage generates the high frequency pulse width modulated wave, and sends the high frequency pulse width modulated wave to the load control circuit; a step of generating a sensing power source, the power generator is driven by the object to be tested, and the sensing power source is simultaneously transmitted to the load control circuit; a third step is to generate a dummy load power source, and the load control circuit receives the a high frequency pulse width modulation wave and the sensing power source are adjusted by the error comparator to generate the dummy load power source and transmitted to the dummy load device Forming a closed-loop negative feedback control loop; wherein, repeating the first step to the third step, the dummy load device forms different power values to obtain different equivalent powers to form a continuously adjustable output power, and output The power is further traced back to the object to be tested via the load control circuit and the power generator to measure the performance parameter of the object to be tested.