CN-121984279-A - Motor position determining device and motor

CN121984279ACN 121984279 ACN121984279 ACN 121984279ACN-121984279-A

Abstract

The invention discloses a motor position determining device and a motor, and relates to the field of motor detection, wherein the motor position determining device comprises a transmission module, a signal reflection module and a processor, wherein the transmission module is used for transmitting continuous signals to a transmission shaft, receiving discrete signals returned by the signal reflection module in the rotation process of the transmission shaft, and forwarding the discrete signals to the transmission shaft; the processor determines a rotational position and a speed of the motor based on the discrete signals. The signal absorption module and the signal reflection module are alternately and fixedly arranged on the transmission shaft of the motor along the axial direction of the transmission shaft, so that the absorption and reflection of signals can be alternately carried out along with the rotation of the motor, the transmission module can not receive the returned signals under the condition of absorption, and the returned signals are received under the condition of reflection, so that the emitted continuous signals can be converted into discrete signals to return, and finally, the rotation position of the motor is determined according to the discrete signals. The method is not influenced by the magnetic field and the temperature in the detection process, reduces the error in the detection process, and has more accurate detection result.

Inventors

HE YONGZHENG
LIU XIN
QI KAIQIANG
ZHENG YI
WANG GAOFEI
LIU GANG
FENG WENQIAN

Assignees

河南翔宇医疗设备股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260130

Claims (10)

1. A motor position determining apparatus, comprising: The signal absorption module and the signal reflection module are fixedly arranged on a transmission shaft of the motor, the signal absorption module and the signal reflection module are alternately arranged along the axial direction of the transmission shaft, the signal absorption module is used for absorbing signals sent by the transmission module, and the signal reflection module is used for reflecting the signals sent by the transmission module; the transmission module is used for sending continuous signals to the transmission shaft based on the control of the processor, receiving discrete signals returned by the signal reflection module in the rotation process of the transmission shaft, and forwarding the discrete signals to the processor; the processor is configured to determine a rotational position and speed of the motor based on the discrete signals.
2. The motor position determining apparatus of claim 1, wherein the transmission module comprises a controllable switch module and a photoelectric transceiver module; the control end of the controllable switch module is connected with the processor, the first end of the controllable switch module is connected with the transmitting end of the photoelectric receiving and transmitting module, the second end of the controllable switch module is grounded, the receiving end of the photoelectric receiving and transmitting module is connected with the processor, and the transmitting end and the receiving end are arranged above the transmission shaft of the motor in parallel; The controllable switch module is used for being conducted based on the control of the processor, and the photoelectric transceiver module is used for emitting light when the first controllable switch module is conducted and forwarding the light to the processor when the reflected light signal is received.
3. The motor position determining apparatus of claim 2, wherein the signal absorbing module is a light absorbing material and the signal reflecting module is a light reflecting material.
4. The motor position determining apparatus of claim 2, wherein the controllable switch module comprises a first current limiting module, a clamping module, and a first controllable switch; The first end of the first current limiting module is connected with the processor, the second end of the first current limiting module is respectively connected with the first end of the clamping module and the control end of the first controllable switch, the second end of the clamping module and the second end of the first controllable switch are grounded, and the first end of the first controllable switch is connected with the transmitting end of the photoelectric transceiver module; The first controllable switch is used for being conducted based on control of the processor, the first current limiting module is used for limiting current, and the clamping module is used for clamping.
5. The motor position determining apparatus of claim 2, wherein the optoelectronic transceiver module includes a second current limiting module, a third current limiting module, a transmitter, and a receiver; The first end of the second current limiting module is connected with a power supply, the second end of the second current limiting module is connected with the first end of the transmitter, the second end of the transmitter is connected with the first end of the first controllable switch module, the first end of the third current limiting module is connected with the power supply, the second end of the third current limiting module is connected with the first end of the receiver, and the second end of the receiver is connected with the processor; The second current limiting module and the third current limiting module are used for limiting current, the transmitter is used for transmitting optical signals to the transmission shaft, and the receiver is used for receiving the optical signals reflected by the signal reflecting module.
6. The motor position determining apparatus of claim 2, further comprising a shaping module; The input end of the shaping module is connected with the output end of the transmission module, the output end of the shaping module is connected with the processor and used for converting the discrete signals into square wave signals, and the high level and the low level of the square wave signals respectively represent the signals reflected by the signal reflecting module and the signals absorbed by the signal absorbing module.
7. The motor position determining apparatus according to claim 6, wherein the shaping module includes a voltage dividing module and an operational amplifier; The first end of the voltage division module is connected with a power supply and the power supply end of the operational amplifier, the second end of the voltage division module is connected with the input negative end of the operational amplifier, the third end of the voltage division module is grounded, the input positive end of the operational amplifier is connected with the output end of the transmission module, and the output end of the operational amplifier is connected with the processor; The voltage dividing module is used for providing a reference voltage for the input negative terminal of the operational amplifier, the operational amplifier is used for outputting a high level of a square wave signal when the voltage of the discrete signal is larger than the reference voltage, and outputting a low level of the square wave signal when the voltage of the discrete signal is smaller than the reference voltage.
8. The motor position determining apparatus according to any one of claims 1 to 7, wherein the axial cross section of the transmission shaft includes a plurality of sets of signal absorbing modules and signal reflecting modules, each set of signal absorbing modules and the signal reflecting modules are arranged in different manners, and the plurality of sets of signal absorbing modules and signal reflecting modules are in one-to-one correspondence with one transmission module.
9. The motor position determining apparatus according to any one of claims 1 to 7, wherein the plurality of axial cross-sectional positions of the transmission shaft each include a set of signal absorbing modules and signal reflecting modules, and each set of signal absorbing modules and signal reflecting modules corresponds to one transmission module one by one.
10. An electric machine comprising a motor position determining device according to any one of claims 1 to 9 for determining the rotational position and speed of the electric machine.

Description

Motor position determining device and motor Technical Field The present invention relates to the field of motor detection, and in particular, to a motor position determining device and a motor. Background The motor is widely used as a conversion component from electric energy to kinetic energy in the fields of industrial control, artificial intelligence, medical appliances, electric automobiles and the like, which relate to motion control. During the movement process of the motor, phenomena such as locked rotor and step-out exist due to various reasons, so that besides the control of the motor movement parameters, the actual movement state also needs to be detected. In the related art, based on detection of a hall sensor, a sensor senses a magnetic field to generate and output a level signal for identifying a motor movement position. The detection method generally installs the magnetic element on the motor rotation surface, requires the sensor sensitivity, detection distance and intensity of detection magnetic field to be well matched during debugging, has high installation and debugging difficulty, changes the magnetic element along with conditions such as movement vibration and heating, or is influenced by the magnetic element in the environment, changes the detection magnetic field, and meanwhile, the sensitivity of the Hall sensor is also changed under the influence of temperature, so that errors are generated and the detection is inaccurate. Disclosure of Invention The invention aims to provide a motor position determining device and a motor, wherein the motor rotation can alternately perform signal absorption and reflection, a transmission module cannot receive a returned signal under the condition of absorption, and the transmission module receives the returned signal under the condition of reflection, so that the emitted continuous signal can be converted into a discrete signal to return, and finally, the motor rotation position is determined according to the discrete signal. The method is not influenced by the magnetic field and the temperature in the detection process, reduces the error in the detection process, and has more accurate detection result. In order to solve the above technical problems, the present invention provides a device for determining a position of a motor, including: The signal absorption module and the signal reflection module are fixedly arranged on a transmission shaft of the motor, the signal absorption module and the signal reflection module are alternately arranged along the axial direction of the transmission shaft, the signal absorption module is used for absorbing signals sent by the transmission module, and the signal reflection module is used for reflecting the signals sent by the transmission module; the transmission module is used for sending continuous signals to the transmission shaft based on the control of the processor, receiving discrete signals returned by the signal reflection module in the rotation process of the transmission shaft, and forwarding the discrete signals to the processor; the processor is configured to determine a rotational position and speed of the motor based on the discrete signals. On the other hand, the transmission module comprises a controllable switch module and a photoelectric transceiver module; the control end of the controllable switch module is connected with the processor, the first end of the controllable switch module is connected with the transmitting end of the photoelectric receiving and transmitting module, the second end of the controllable switch module is grounded, the receiving end of the photoelectric receiving and transmitting module is connected with the processor, and the transmitting end and the receiving end are arranged above the transmission shaft of the motor in parallel; The controllable switch module is used for being conducted based on the control of the processor, and the photoelectric transceiver module is used for emitting light when the first controllable switch module is conducted and forwarding the light to the processor when the reflected light signal is received. On the other hand, the signal absorption module is made of light absorption materials, and the signal reflection module is made of light reflection materials. On the other hand, the controllable switch module comprises a first current limiting module, a clamping module and a first controllable switch; The first end of the first current limiting module is connected with the processor, the second end of the first current limiting module is respectively connected with the first end of the clamping module and the control end of the first controllable switch, the second end of the clamping module and the second end of the first controllable switch are grounded, and the first end of the first controllable switch is connected with the transmitting end of the photoelectric transceiver module; The first controllable switch is used for being conduct