Motor control system test circuit

Abstract

The utility model discloses a motor control system test circuit, and belongs to the technical field of motor control system test. The test circuit comprises an upper computer, a programmable digital power supply and a storage unit, the upper computer is connected with the programmable digital power supply and is used for controlling the programmable digital power supply to output a voltage signal to the motor to be tested; the upper computer, the storage unit and the to-be-tested motor are connected in sequence, and the storage unit receives and stores motor state information of the to-be-tested motor and feeds back the motor state information to the upper computer. According to the utility model, the test of the motor control system can be completed, the integration level is high, test errors caused by human factors are reduced, the requirements of big data and modern manufacturing industry production are met, the data can be managed and stored in a centralized manner, and the working efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control system testing, in particular to a motor control system testing circuit. Background Art

[0002] Small and micro motors have been widely used in all aspects of our lives and have played a very important role in people's production and life. However, the testing of motor control systems is still a single-machine operation, relying on manpower and semi-automatic tooling equipment production, and more on human eyes and ears for sight and hearing recognition. The integration of motor test equipment is low, and test data cannot be centrally managed and stored for a long time.

[0003] The shortcomings and defects of existing technologies are mainly reflected in: low system integration, relatively backward testing technology, inability to meet the needs of big data and modern manufacturing production, inability to centrally manage and save testing and manufacturing data, and low work efficiency. Summary of the invention

[0004] In view of the above problems, the utility model provides a motor control system test circuit, which has high test integration, can centrally manage and save data, and has high work efficiency.

[0005] In order to achieve the above object, the utility model provides a motor control system test circuit, including a host computer, a programmable digital power supply, a storage unit and a motor to be tested;

[0006] The host computer is connected to the programmable digital power supply and is used to control the programmable digital power supply to output a voltage signal to the motor to be tested;

[0007] The host computer, the storage unit and the motor to be tested are connected in sequence. The storage unit receives the motor state information of the motor to be tested, stores it, and feeds it back to the host computer.

[0008] Further, the programmable digital power supply includes a main power supply, an auxiliary power supply, a microcontroller and a synchronous BUCK step-down circuit;

[0009] The microcontroller receives the signal output by the host computer and outputs it to the synchronous BUCK step-down circuit for voltage control;

[0010] The synchronous BUCK step-down circuit is connected to the motor controller to be tested and outputs a target voltage for power supply;

[0011] The main power supply and the auxiliary power supply are used to supply power to each module.

[0012] Further, the microcontroller includes a microprocessor, a PWM generator, a MOSFET driver, an ADC and a memory;

[0013] The microprocessor, PWM generator and MOSFET driver are connected in sequence; the microprocessor is also connected to the ADC and memory; the MOSFET driver is connected to the auxiliary power supply for power supply;

[0014] The microprocessor receives the signal output by the host computer, and at the same time receives the voltage and current signal output by the synchronous BUCK buck topology circuit sampled by the ADC; outputs a control signal to the PWM generator to adjust the duty cycle, and outputs a drive signal to the synchronous BUCK buck topology circuit after amplification by the MOSFET driver.

[0015] Furthermore, the gate of the high-side MOSFET and the gate of the low-side MOSFET in the synchronous BUCK buck topology circuit are respectively connected to the output of the MOSFET driver; the source of the high-side MOSFET is connected to the drain of the low-side MOSFET and is also connected to a high-frequency power inductor; the other end of the high-frequency power inductor is connected to a first capacitor and a second capacitor, and is also the positive electrode of the output load; the source of the low-side MOSFET is grounded, and is also connected to the other ends of the first capacitor and the second capacitor and one end of a resistor, and the other end of the resistor is the negative electrode of the output load; the drain of the high-side MOSFET is connected to a third capacitor and a fourth capacitor, and the other ends of the third capacitor and the fourth capacitor are grounded.

[0016] Furthermore, the output target voltage range of the synchronous BUCK step-down circuit is 0-35V, the main power supply voltage is 48V, and the auxiliary power supply voltage is 12V.

[0017] Beneficial effects of the utility model:

[0018] The test circuit provided by the utility model can carry out motor control system testing, has high integration, reduces test errors caused by human factors, meets the needs of big data and modern manufacturing production, and can centrally manage and save data at the same time, with high work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a motor control system test circuit according to an embodiment of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of a programmable digital power supply according to an embodiment of the utility model.

[0021] Figure 3 It is a schematic diagram of the connection structure of a microcontroller and a synchronous BUCK step-down circuit in an embodiment of the utility model.

[0022] Among them: Q5-high-side MOSFET, Q6-low-side MOSFET, L1-high-frequency power inductor, C16-first capacitor, C15-second capacitor, R29-resistor, C5-third capacitor, C4-fourth capacitor. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 As shown, an embodiment of the utility model provides a motor control system test circuit, including a host computer, a programmable digital power supply, a storage unit and a motor to be tested.

[0025] The host computer is connected to a programmable digital power supply to control the programmable digital power supply to output a voltage signal to the motor to be tested. At the same time, the host computer, the storage unit and the motor to be tested are connected in sequence, and the storage unit receives the motor state information of the motor to be tested for storage and feeds it back to the host computer.

[0026] like Figure 2 As shown, the programmable digital power supply includes a main power supply, an auxiliary power supply, a microcontroller and a synchronous BUCK buck circuit. The microcontroller receives the control signal from the host computer and outputs it to the synchronous BUCK buck circuit for voltage control; the synchronous BUCK buck circuit is connected to the motor controller to be tested and outputs the target voltage to it; the main power supply and the auxiliary power supply are used to power each module, the main power supply voltage is 48V, and the auxiliary power supply voltage is 12V.

[0027] like Figure 3 As shown, the microcontroller further includes a microprocessor, an ADC, a PWM generator, a MOSFET driver and a memory. The microprocessor, the PWM generator and the MOSFET driver are connected in sequence; the microprocessor is also connected to the memory and the ADC at the same time. The memory is used to store the internal program of the programmable digital power supply, and the MOSFET driver is connected to the auxiliary power supply for power supply.

[0028] The microprocessor receives the control signal transmitted from the host computer, and at the same time receives the voltage and current signal output by the synchronous BUCK buck topology circuit sampled by the ADC; outputs the signal to the PWM generator to adjust the duty cycle, and controls the MOSFET driver to output the driving signal to the synchronous BUCK buck topology circuit.

[0029] Its working principle is as follows: the microprocessor receives the input control signal, which is a 0-5V analog quantity, and this analog quantity will be converted into a 0-35V target voltage instruction. The microprocessor also obtains the actual voltage (Load) on the load through voltage sampling, outputs the control quantity, adjusts the PWM duty cycle through the PWM transmitter, and the PWM duty cycle signal is amplified by the MOSFET driver before driving the external MOSFET. Thus, a voltage closed-loop control circuit is formed. Current sampling can realize overcurrent protection to prevent damage to the digital power system after a short circuit failure occurs in the load.

[0030] In the synchronous BUCK buck topology circuit, the source of the high-side MOSFET Q5 is connected to the drain of the low-side MOSFET Q6, and is also connected to the high-frequency power inductor L1; the other end of the high-frequency power inductor L1 is connected to the first capacitor C16 and the second capacitor C15, and is also the positive electrode of the output voltage; the other ends of the first capacitor C16 and the second capacitor C15 are connected to the source of the low-side MOSFET Q6, and are also connected to the resistor R29, and the other end of the resistor R29 is the negative electrode of the output voltage; the drain of the high-side MOSFET Q5 is connected to the third capacitor C5 and the fourth capacitor C4, and the other ends of the third capacitor C5 and the fourth capacitor C4 are grounded; the gate of the high-side MOSFET Q5 and the gate of the low-side MOSFET Q6 are respectively connected to the output of the MOSFET driver, and its output target voltage range is 0-35V.

[0031] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A motor control system test circuit, characterized in that: It includes a host computer, a programmable digital power supply and a storage unit; The host computer is connected to the programmable digital power supply and is used to control the programmable digital power supply to output a voltage signal to the motor to be tested; The host computer, the storage unit and the motor to be tested are connected in sequence. The storage unit receives the motor state information of the motor to be tested, stores it, and feeds it back to the host computer.

2. The motor control system test circuit according to claim 1, characterized in that: The programmable digital power supply includes a main power supply, an auxiliary power supply, a microcontroller and a synchronous BUCK step-down circuit; The microcontroller receives the signal output by the host computer and outputs it to the synchronous BUCK step-down circuit for voltage control; The synchronous BUCK step-down circuit is connected to the motor controller to be tested and outputs a target voltage for power supply; The main power supply and the auxiliary power supply are used to supply power to each module.

3. The motor control system test circuit according to claim 2, characterized in that: The microcontroller includes a microprocessor, a PWM generator, a MOSFET driver, an ADC and a memory; The microprocessor, PWM generator and MOSFET driver are connected in sequence; the microprocessor is also connected to the ADC and memory; the MOSFET driver is connected to the auxiliary power supply for power supply; The microprocessor receives the signal output by the host computer, and at the same time receives the voltage and current signal output by the synchronous BUCK buck topology circuit sampled by the ADC; outputs a control signal to the PWM generator to adjust the duty cycle, and outputs a drive signal to the synchronous BUCK buck topology circuit after amplification by the MOSFET driver.

4. The motor control system test circuit according to claim 3, characterized in that: The gate of the high-side MOSFET Q5 and the gate of the low-side MOSFET Q6 in the synchronous BUCK buck topology circuit are respectively connected to the output of the MOSFET driver; the source of the high-side MOSFET Q5 is connected to the drain of the low-side MOSFET Q6 and is also connected to the high-frequency power inductor L1; the other end of the high-frequency power inductor L1 is connected to the first capacitor C16 and the second capacitor C15, and is also the positive electrode of the output load; the source of the low-side MOSFET Q6 is grounded, and is also connected to the other ends of the first capacitor C16 and the second capacitor C15 and one end of the resistor R29, and the other end of the resistor R29 is the negative electrode of the output load; the drain of the high-side MOSFET Q5 is connected to the third capacitor C5 and the fourth capacitor C4, and the other ends of the third capacitor C5 and the fourth capacitor C4 are grounded.

5. The motor control system test circuit according to claim 2, characterized in that: The output target voltage range of the synchronous BUCK step-down circuit is 0-35V, the main power supply voltage is 48V, and the auxiliary power supply voltage is 12V.

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