A kind of cannon AC permanent magnet synchronous motor rotor position signal detection circuit and detection method

Abstract

The application provides a kind of artillery AC permanent magnet synchronous motor rotor position signal detection circuit and detection method, the circuit includes power module, socket X1, socket X2, ground detection interface GND and multiple groups of parallel rotor position signal detection module;Rotor position signal detection module includes the light emitting diode of series connection, resistance and detection interface;Detection interface is used to detect rotor position signal, and the detection interface in ground detection interface GND and each group of rotor position signal detection module is connected with the connecting core line between socket X1 and socket X2 respectively;Socket X1 and socket X2 are connected with cable and equipment connection cable respectively, for motor rotor position signal input and output.The application can be measured or observed the state display of signal lamp on detection circuit by oscilloscope under the condition of artillery power on or not, judges motor rotor position signal fault, and the detection mode is multiple, efficient and safe.

Description

Technical Field

[0001] This invention relates to the field of gun motor testing, specifically to a rotor position signal detection circuit and method for an AC permanent magnet synchronous motor used in artillery. Background Technology

[0002] refer to Figure 5 The existing artillery speed control system includes an AC driver, an AC permanent magnet synchronous motor, a three-phase AC power cable, a speed feedback signal cable, a DC power supply, and a motor rotor position signal cable. The AC driver is installed in a cabinet, and the AC permanent magnet synchronous motor is installed on the artillery. The AC permanent magnet synchronous motor and the AC driver are connected in series via three cables. When the artillery speed control system is powered on, the AC driver provides AC power to the three-phase stator coils of the AC permanent magnet synchronous motor and DC power to the motor rotor position generator. The tachometer of the AC permanent magnet synchronous motor provides the motor speed signal to the AC driver, and the rotor position generator provides the motor rotor position signal to the AC driver. The AC driver controls the speed of the AC permanent magnet synchronous motor based on the speed signal output by the tachometer. Simultaneously, the AC permanent magnet synchronous motor rotor position generator outputs three motor rotor position pulse signals to the AC driver. The AC driver determines the positional relationship between the rotor and stator coils of the AC permanent magnet synchronous motor based on the combined signals output by the motor rotor position generator, and sequentially energizes the three-phase coils of the AC permanent magnet synchronous motor. In this way, the AC driver controls the AC permanent magnet synchronous motor to drive the artillery to operate normally.

[0003] refer to Figure 6 When the artillery speed control system malfunctions, in order to troubleshoot the motor rotor position signal, it is necessary to test the motor rotor position signal online. The existing method is to lead four test wires from the DC power supply between the AC permanent magnet synchronous motor and the AC driver and the plug of the motor rotor position signal cable. When the artillery speed control system is powered on, the motor rotor position signal is tested online using an oscilloscope.

[0004] The above detection method can detect the rotor position signal of the motor, but it requires temporary welding of test leads to the connecting cable between the AC permanent magnet synchronous motor rotor position generator and the AC driver. This not only damages the original cable condition, but also requires the AC driver to be powered on to perform the test, which poses a safety risk. The method is complicated to operate, time-consuming, and has low testing efficiency. Furthermore, it can only measure the rotor position signal of the motor with the help of an oscilloscope, making the testing method limited. Summary of the Invention

[0005] To address the safety hazards and low efficiency of existing methods for detecting motor rotor position signals in artillery commissioning systems, this invention proposes a detection circuit and method for AC permanent magnet synchronous motor rotor position signals.

[0006] The technical solution of the present invention is: a rotor position signal detection circuit for an AC permanent magnet synchronous motor, comprising a detection box, wherein the detection box includes a power module, a socket X1, a socket X2, a ground detection interface GND, and multiple sets of rotor position signal detection units; the multiple sets of rotor position signal detection units are connected in parallel.

[0007] The rotor position signal detection unit includes a light-emitting diode, a resistor, and a detection interface connected in series. The detection interface is used to acquire the pulse signal from the three-phase rotor position generator of the motor.

[0008] The power module includes a battery, an indicator light HL, and a power switch SA. One end of the power switch SA is connected to the positive terminal of the battery, and the other end of the power switch SA is connected to the 1-core wire of the socket X2 and one end of the indicator light HL. The negative terminal of the battery, the other end of the indicator light HL, and the negative terminal of the light-emitting diode in each set of rotor position signal detection units are all connected to the ground interface GND.

[0009] Each core wire in socket X1 is connected to the corresponding core wire in socket X2;

[0010] The grounding detection interface GND and the detection interfaces in each group of rotor position signal detection units are respectively connected to the corresponding connecting core wires of socket X2; the grounding detection interface GND is used to collect the grounding signal of the three-phase motor rotor position generator;

[0011] The socket X1 is connected to the AC driver in the artillery speed control system via a cable, and the socket X2 is connected to the AC permanent magnet synchronous motor rotor position generator in the artillery speed control system via the original equipment connection cable, so as to realize the transmission of the motor rotor position signal.

[0012] The method for detecting the motor rotor position signal in the artillery speed control system using the above-mentioned detection circuit is divided into two types: detection when the artillery power system is not powered on and detection when the artillery system is powered on.

[0013] (1) When the artillery system is not powered on, the detection includes the following steps:

[0014] Step 1: Turn on the power switch SA. The battery supplies power to the rotor position generator of the AC permanent magnet synchronous motor. The indicator light HL illuminates, pushing the cannon to make the motor run.

[0015] Step 2: Use an oscilloscope to acquire three sets of pulse signals from the motor rotor position generator through the detection interface of each set of rotor position signal detection units. If the pulse widths of the three pulse signals are equal and the time interval between the rising edges of adjacent pulse sets is equal within one rotation cycle of the motor, then the motor rotor position signal is normal; otherwise, it indicates that the rotor position signal is abnormal.

[0016] Alternatively, observe the on / off status of the LEDs in each rotor position signal detection unit. If any two of the three LEDs are lit, it indicates that the motor rotor position signal is normal; otherwise, it indicates that the motor rotor position signal is abnormal.

[0017] (2) When the artillery system is powered on, the detection includes the following steps:

[0018] Step a: Disconnect the power switch SA. The AC driver supplies power to the rotor position generator of the AC permanent magnet synchronous motor, the indicator light HL illuminates, and the AC driver drives the AC permanent magnet synchronous motor to rotate the artillery.

[0019] Step b: Perform the detection and judgment according to the method in step 2 when the artillery system is not powered on.

[0020] The advantages of this invention are:

[0021] 1. The detection circuit of this invention is connected to the AC driver and the original equipment connection cable respectively via a cable. It can detect the rotor position signal of the AC permanent magnet synchronous motor in both the case of the artillery system being powered on and not powered on. The detection method is diversified and the detection efficiency is high.

[0022] 2. This circuit connects directly to the original cable without changing the technical condition of the equipment. It is easy to carry. This circuit only detects the rotor position signal of the motor in the artillery speed control system and has no reverse connection, so it does not affect the performance and reliability of the speed control system.

[0023] 3. This invention uses cables to connect to the AC driver and the original equipment cable respectively, which reduces interference from wiring to the signal and ensures accurate measurement results.

[0024] 4. When using this invention for testing, the signal can be measured using an oscilloscope, or the motor rotor position signal can be judged by observing the status display of the indicator lights on the detection circuit. The operation is convenient and the signal status display is intuitive. Attached Figure Description

[0025] Figure 1 This invention provides a schematic diagram of fault detection for the rotor position signal of an AC permanent magnet synchronous motor in an artillery speed control system.

[0026] Figure 2 : Circuit diagram of the detection circuit and cable connection of this invention;

[0027] Figure 3 Schematic diagram of the detection circuit connection in this invention:

[0028] Figure 4 : A schematic diagram of the cable line in this invention;

[0029] Figure 5Diagram of the artillery speed control system connection;

[0030] Figure 6 Background Art: A schematic diagram of the fault detection connection of the artillery speed control system. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0032] This invention discloses a rotor position signal detection circuit for an AC permanent magnet synchronous motor, comprising a power module, socket X1, socket X2, ground detection interface GND, and multiple sets of rotor position signal detection units; the multiple sets of rotor position signal detection units are connected in parallel.

[0033] The rotor position signal detection unit includes a light-emitting diode, a resistor, and a detection interface connected in series. The detection interface is used to acquire the pulse signal of the patented position generator for the three-phase motor.

[0034] The power module includes a battery, an indicator light HL, and a power switch SA. One end of the power switch SA is connected to the positive terminal of the battery, and the other end of the power switch SA is connected to the 1-core wire of the socket X2 and one end of the indicator light HL. The negative terminal of the battery, the other end of the indicator light HL, and the negative terminal of the light-emitting diode in each group of rotor position signal detection are all connected to the ground interface GND.

[0035] Each core wire in socket X1 is connected to the corresponding core wire in socket X2;

[0036] The grounding detection interface GND and the detection interfaces in each group of rotor position signal detection units are respectively connected to the corresponding connecting core wires of socket X2; the grounding detection interface GND is used to collect the grounding signal of the three-phase motor rotor position generator.

[0037] The socket X1 is connected to the AC driver in the artillery speed control system via a cable, and the socket X2 is connected to the AC permanent magnet synchronous motor rotor position generator via the original equipment connection cable to realize the transmission of motor rotor position signals.

[0038] Reference Figure 1 and Figure 2 The detection circuit is connected between the AC driver and the original equipment connection cable. The socket X2 of the detection circuit is connected to the plug P3 of the equipment connection cable, the socket X1 of the detection circuit is connected to the plug P1 of the cable, and the plug P2 of the cable is connected to the socket X3 of the AC driver.

[0039] Reference Figure 3The motor rotor position signal detection circuit includes a battery, socket X1, socket X2, switch SA, indicator light HL, LEDs VD1, VD2, and VD3, resistors R1, R2, and R3, detection interface R, detection interface T, detection interface S, and detection interface GND. The positive terminal of the battery is connected to one end of switch SA, and the negative terminal is connected to detection interface GND. The other end of switch SA is connected to one end of indicator light HL and one core wire of socket X1. One core wire of socket X1 is connected to one core wire of socket X2. The other end of indicator light HL is connected to detection port GND. Detection port GND is connected to two core wires of socket X2. Two core wires of socket X1 and two core wires of socket X2 are connected together. One end of resistor R1 is connected to the positive terminal of LED VD1, and the other end of resistor R1 is connected to detection interface R. The negative terminal of LED VD1 is connected to detection interface GND. Detection interface R is connected to the 3-core wire of socket X2, and the 3-core wires of socket X1 and socket X2 are connected together. One end of resistor R2 is connected to the positive terminal of LED VD2, and the other end of resistor R2 is connected to detection interface T. The negative terminal of LED VD2 is connected to detection interface GND, and detection interface T is connected to the 4-core wire of socket X1, and the 4-core wires of socket X1 and socket X2 are connected together. One end of resistor R3 is connected to the positive terminal of LED VD3, and the other end of resistor R3 is connected to detection interface S. The negative terminal of LED VD3 is connected to detection interface GND, and detection interface S is connected to the 5-core wire of socket X2, and the 5-core wires of socket X1 and socket X2 are connected together.

[0040] The battery, sockets X1 and X2, resistors R1, R2, and R3 are installed inside the detection box for easy fixation and quick cable connection. Switch SA, indicator light HL, LEDs VD1, VD2, and VD3, detection holes R, T, S, and GND are installed on the detection box panel for convenient signal display and detection.

[0041] The battery provides DC power to the detection circuit; switch SA controls the connection and disconnection of the battery voltage; indicator light HL displays the DC voltage supply status; sockets X1 and X2 of the detection box facilitate quick connection to the cable; LEDs VD1, VD2, and VD3 display the rotor position signal output status; resistors R1, R2, and R3 limit the current of the rotor position signal; detection holes R, T, S, and GND facilitate the detection of the three-phase motor rotor position signal.

[0042] refer to Figure 4The cable is used for inputting or outputting rotor position signals. The cable includes plugs P1 and P2, and core wires. The core wires of plugs P1 and P2 are connected correspondingly. The core wires include a power line, a grounding line, and the first phase signal line R, the second phase signal line T, and the third phase signal line S of the three-phase motor rotor position signal. The cable core wires correspond one-to-one with the core wires of the AC driver, socket X1, and socket X2.

[0043] Working principle:

[0044] When the artillery system is not powered:

[0045] The rotor position signal of the AC permanent magnet synchronous motor can be detected independently. When the power switch SA is turned on, the indicator light HL illuminates, and the battery powers the rotor position generator of the AC synchronous motor. While manually pushing the cannon to run the motor, the rotor position signals of the three phases of the motor are acquired using an oscilloscope from the first phase detection hole R, the second phase detection hole T, and the third phase detection hole S. Based on the waveforms acquired on the oscilloscope, the status of the motor position signal is determined.

[0046] When the motor rotates, the three-phase rotor position generator will generate three pulse signals. If the pulse widths of the three pulse signals are equal and the time interval between the rising edges of adjacent pulse signals is equal within one cycle of motor rotation, then the motor rotor position signal is normal; otherwise, it indicates that the rotor position signal is abnormal.

[0047] Without an oscilloscope, observe the on / off state of LEDs VD1, VD2, and VD3 to determine the motor position signal status. If any two of the three LEDs are on, the motor rotor position signal is normal; otherwise, the motor rotor position signal is abnormal.

[0048] When the artillery system is powered on:

[0049] During the operation of the artillery driven by the AC permanent magnet synchronous motor, the rotor position signal of the AC permanent magnet synchronous motor can be detected online. With the power switch SA disconnected, the artillery system is powered on, and the AC driver supplies power to the rotor position generator of the AC synchronous motor. The indicator light HL illuminates. As the AC driver drives the AC permanent magnet synchronous motor to operate the artillery, the status of the motor position signal is determined based on the waveforms acquired on the oscilloscope. When the motor rotates, the three-phase rotor position generator produces three pulse signals. If the pulse widths of the three pulse signals are equal, and the time interval between the rising edges of the pulses is equal within one cycle of motor rotation, then the motor rotor position signal is normal.

[0050] Without an oscilloscope, observe the on / off state of LEDs VD1, VD2, and VD3 on the test box to determine the motor position signal status. If any two of the three LEDs are lit, the motor rotor position signal is normal; otherwise, the rotor position signal is abnormal.

[0051] Operators can choose to detect the rotor position generator signal of the AC synchronous motor when the artillery system is not powered or when it is not powered, according to actual needs, thus realizing the diversification of detection methods.

[0052] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the scope of the technology disclosed in the present invention, and such modifications or substitutions should all be covered within the scope of protection of the present invention.

Claims

1. A rotor position signal detection circuit for an AC permanent magnet synchronous motor used in artillery, characterized in that, The system includes a detection box, which comprises a power module, a socket X1, a socket X2, a ground detection interface GND, and multiple sets of rotor position signal detection units; the multiple sets of rotor position signal detection units are connected in parallel. The rotor position signal detection unit includes a light-emitting diode, a resistor, and a detection interface connected in series. The detection interface is used to acquire the pulse signal from the three-phase motor rotor position generator. The power module includes a battery, an indicator light HL, and a power switch SA. One end of the power switch SA is connected to the positive terminal of the battery, and the other end of the power switch SA is connected to the core wire of the socket X2 and one end of the indicator light HL. The negative terminal of the battery, the other end of the indicator light HL, and the negative terminal of the light-emitting diode in each set of rotor position signal detection units are all connected to the ground detection interface GND. Each core wire in socket X1 is connected to the corresponding core wire in socket X2; The grounding detection interface GND and the detection interfaces in each group of rotor position signal detection units are respectively connected to the corresponding connecting core wires of socket X2; the grounding detection interface GND is used to collect the grounding signal of the three-phase motor rotor position generator; The socket X1 is connected to the AC driver in the artillery speed control system via a cable, and the socket X2 is connected to the AC permanent magnet synchronous motor rotor position generator in the artillery speed control system via the original equipment connection cable, so as to realize the transmission of the motor rotor position signal.

2. The detection circuit according to claim 1, characterized in that, The cable is a five-wire cable, including plug P1 and plug P2. The core wires of plug P1 and plug P2 are connected accordingly. The core wires include a power line, a grounding line, a first phase signal line, a second phase signal line, and a third phase signal line for the three-phase motor rotor position signal. The cable core wires correspond one-to-one with the core wires of the AC driver, socket X1, and socket X2.

3. A method for detecting the rotor position signal of a motor in an artillery speed control system using the detection circuit described in claim 1, characterized in that, Divided into artillery system non-powered testing and artillery system powered testing: (1) When the artillery system is not powered on, the detection includes the following steps: Step 1: Turn on the power switch SA. The battery supplies power to the rotor position generator of the AC permanent magnet synchronous motor. The indicator light HL illuminates, pushing the cannon to make the motor run. Step 2: Use an oscilloscope to acquire three pulse signals from the motor rotor position generator at the detection interface of each group of rotor position signal detection units. If the pulse widths of the three pulse signals are equal and the time interval between the rising edges of adjacent pulse signals is equal within one rotation cycle of the motor, it indicates that the motor rotor position signal is normal; otherwise, it indicates that the rotor position signal is abnormal. Alternatively, observe the on / off status of the LEDs in each rotor position signal detection unit. If any two of the three LEDs are lit, it indicates that the motor rotor position signal is normal; otherwise, it indicates that the motor rotor position signal is abnormal. (2) When the artillery system is powered on, the detection includes the following steps: Step a: Disconnect the power switch SA. The AC driver supplies power to the rotor position generator of the AC permanent magnet synchronous motor, the indicator light HL illuminates, and the AC driver drives the AC permanent magnet synchronous motor to rotate the artillery. Step b: Perform the detection and judgment according to the method in step 2 when the artillery system is not powered on.

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