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CN-121995147-A - Current-carrying capacity test circuit of electronic speed regulator

CN121995147ACN 121995147 ACN121995147 ACN 121995147ACN-121995147-A

Abstract

The application provides a current carrying capacity test circuit of an electronic speed regulator, which comprises a brushless direct current motor motion system, a second electronic speed regulator, a rectifier and a direct current electronic load. After the second electronic speed regulator is subjected to targeted modification, the second grid driving chip and the second three-phase full-bridge inverter circuit are kept to work. The brushless DC motor motion system generates a low-voltage logic driving signal and outputs the low-voltage logic driving signal to the second electronic speed regulator, the second electronic speed regulator receives the signal through the second grid driving chip and drives the second three-phase full-bridge inverter circuit to work, the second input direct current is converted into second three-phase alternating current synchronous with the switching time sequence of the driving signal, the rectifier rectifies the second three-phase alternating current into second direct current, the DC electronic load receives the second direct current, and the current stress applied to the second electronic speed regulator under different load working systems is simulated. The controllable and reproducible current carrying capability test using the electronic speed regulator as a single test object is realized.

Inventors

  • WU ZHONGXUN

Assignees

  • 吴忠勋

Dates

Publication Date
20260508
Application Date
20260310

Claims (10)

  1. 1. The electronic speed regulator current carrying capacity test circuit is characterized by comprising a brushless direct current motor motion system, a second electronic speed regulator, a rectifier and a direct current electronic load, wherein the second electronic speed regulator comprises a second grid driving chip, a second three-phase full-bridge inverter circuit and a second microprocessor, and the second electronic speed regulator is subjected to targeted modification, wherein the power input end of the second microprocessor is disconnected, and the low-voltage logic driving signal output pin of the second electronic speed regulator is in a high-resistance state; The brushless direct current motor motion system is used for generating a low-voltage logic driving signal and outputting the low-voltage logic driving signal to a second electronic speed regulator; The second electronic speed regulator is configured to receive the low-voltage logic driving signal through the second gate driving chip, and drive the second three-phase full-bridge inverter circuit to work according to the low-voltage logic driving signal, so as to convert a second input direct current into a second three-phase alternating current synchronous with a switching time sequence of the low-voltage logic driving signal; the rectifier is used for receiving the second three-phase alternating current and rectifying the second three-phase alternating current into second direct current; the direct current electronic load is used for receiving the second direct current and simulating current stress applied to the second electronic speed regulator under different load working systems by setting different current parameters, working modes and test sequences.
  2. 2. The test circuit of claim 1, wherein the brushless DC motor motion system comprises a first voltage stabilizing source, a control signal generating device, a first electronic speed regulator and a brushless DC motor; the first voltage stabilizing source is used for supplying power to the control signal generating device and the first electronic speed regulator; The control signal generating device is used for providing a control signal for the first electronic speed regulator; the first electronic speed regulator is used for driving the brushless direct current motor to rotate according to the control signal and outputting the low-voltage logic driving signal.
  3. 3. The test circuit of claim 2, wherein the first electronic governor comprises a first microprocessor, a first linear power supply chip, a first pull-down resistor, a first gate drive chip, and a first three-phase full-bridge inverter circuit; the first linear power supply chip is used for supplying power to the first microprocessor; the first microprocessor is used for receiving the control signal provided by the control signal generating device and generating a low-voltage logic driving signal according to a back electromotive force feedback signal generated in the running process of the brushless direct current motor; the first pull-down resistor is used for receiving the low-voltage logic driving signal and clamping the low-voltage logic driving signal to the ground level when the first microprocessor is in a high-resistance state, so that false triggering of the first grid driving chip is avoided; the first grid driving chip is used for receiving the low-voltage logic driving signal, performing level conversion and outputting a driving signal; the first three-phase full-bridge inverter circuit is used for performing switching action according to the driving signal and converting direct current provided by the first voltage stabilizing source into first three-phase alternating current for driving the brushless direct current motor.
  4. 4. The test circuit of claim 1, further comprising temperature acquisition means for acquiring temperature distribution information during operation of the second electronic governor.
  5. 5. The test circuit of claim 4, wherein the temperature acquisition device comprises a non-contact thermal infrared imager or a contact thermocouple.
  6. 6. The test circuit of claim 1, further comprising voltage acquisition means for acquiring the rectified voltage waveform of the second three-phase alternating current in real time.
  7. 7. The test circuit of claim 6, wherein the voltage acquisition device comprises a contact oscilloscope or a non-contact voltage probe instrument.
  8. 8. The test circuit of claim 2, wherein the control signal generating means comprises a PWM generator or a digital serial signal source or an analog voltage signal source capable of transmitting other protocols.
  9. 9. The test circuit of claim 2, wherein the brushless dc motor is in an idle state without a propeller or in a loaded state with a propeller.
  10. 10. The test circuit of claim 9, wherein the dc electronic load sets the current parameter, the operating mode, and the test sequence according to an operating process of the first electronic governor during the brushless dc motor in the idle state and the loaded state.

Description

Current-carrying capacity test circuit of electronic speed regulator Technical Field The application relates to the technical field of electronic speed regulator testing, in particular to a current carrying capacity testing circuit of an electronic speed regulator. Background The electronic speed regulator (also called as an electric control or ESC) is a core component in the unmanned aerial vehicle system, is positioned between the flight control unit and the brushless direct current motor, and is used for receiving an accelerator signal (such as a PWM signal or DShot protocol signal) sent by the flight control unit and driving the brushless direct current motor to rotate according to a target rotating speed. The current carrying capacity of the electronic speed regulator is the capacity of continuously or instantaneously processing the current under the premise of ensuring safety, reliability and no damage, and is a key index for matching the power of a motor and ensuring the flight performance and safety. Currently, electronic speed regulators on the market generally perform current carrying capacity tests by connecting a brushless dc motor with a propeller and inputting a throttle signal. However, during the test, the current carrying capacity data of the electronic governor is affected by the performance of the brushless dc motor and the propeller due to the introduction of two variables, the brushless dc motor and the propeller. Meanwhile, a Microprocessor (MCU) of the electronic speed regulator has certain closed-loop driving control and locked-rotor protection control functions, back electromotive force and phase current of the brushless direct current motor can be monitored in real time, and the electronic speed regulator can continuously drive the brushless direct current motor to rotate according to the target rotating speed only when the two parameters are in a normal range. The existing scheme can only realize that the electronic speed regulator performs limited current carrying capacity test under the condition that a certain motor and propeller combination is used as the load of the electronic speed regulator, and cannot ensure that the electronic speed regulator is in a safe and controllable condition, so that the electronic speed regulator reaches the maximum current carrying and physical heat dissipation balance point. Meanwhile, in the existing scheme, an electronic speed regulator is used as an important component of a speed regulating electric transmission system, the load working system type is fixed, and corresponding current rated value measurement under different load working systems defined by GB/T12668.6 can not be carried out through controllable loads. Disclosure of Invention Accordingly, an objective of the present application is to provide a current-carrying capability test circuit for an electronic governor, which overcomes the problems of the prior art. The embodiment of the application provides a current-carrying capacity test circuit of an electronic speed regulator, which is used for testing the current-carrying capacity of a second electronic speed regulator, and comprises a brushless direct current motor motion system, the second electronic speed regulator, a rectifier and a direct current electronic load, wherein the second electronic speed regulator comprises a second grid driving chip, a second three-phase full-bridge inverter circuit and a second microprocessor, wherein the second electronic speed regulator is subjected to targeted modification, the power input end of the second microprocessor is disconnected, and the low-voltage logic driving signal output pin of the second electronic speed regulator is in a high-resistance state; The brushless direct current motor motion system is used for generating a low-voltage logic driving signal and outputting the low-voltage logic driving signal to a second electronic speed regulator; The second electronic speed regulator is configured to receive the low-voltage logic driving signal through the second gate driving chip, and drive the second three-phase full-bridge inverter circuit to work according to the low-voltage logic driving signal, so as to convert a second input direct current into a second three-phase alternating current synchronous with a switching time sequence of the low-voltage logic driving signal; the rectifier is used for receiving the second three-phase alternating current and rectifying the second three-phase alternating current into second direct current; the direct current electronic load is used for receiving the second direct current and simulating current stress applied to the second electronic speed regulator under different load working systems by setting different current parameters, working modes and test sequences. In some technical schemes of the application, the brushless direct current motor motion system comprises a first voltage stabilizing source, a control signal generating device, a first