TWI702787B - Control device for three-phase permanent magnet motor - Google Patents

Abstract

A control device for a three-phase permanent magnet motor, comprising a data processing unit, a storage unit, and a switching unit. The data processing unit is electrically connected to the three-phase permanent magnet motor, the storage unit is electrically connected to the data processing unit, and the switching unit Electrically connected to the data processing unit, the switching unit has a detection mode and an operation mode; when the switching unit is in the detection mode, the data processing unit detects the operating parameters of the three-phase permanent magnet motor and stores the operating parameters in the storage unit. When the switching unit is in operation mode, the three-phase permanent magnet motor can be controlled and run correspondingly, so that the three-phase permanent magnet motor can be controlled more accurately, even if there are performance differences between the three-phase permanent magnet motors, it can be more efficient Control its operating performance.

Description

Control device for three-phase permanent magnet motor

The present invention is related to motors, and particularly refers to a control device for three-phase permanent magnet motors.

Motors are widely used in various industries. Whether it is DC motors or AC motors, various types of motors can be used in different technical fields with different needs. And with the rapid development of semiconductor technology and motor manufacturing technology, the work of motors is constantly improved. Performance and quality of use.

For example, permanent magnet motors can improve energy conversion efficiency through accurate phase control technology, reduce power consumption and achieve energy saving purposes. Compared with traditional brushed motors, they have higher power density, higher conversion efficiency, high torque generation capacity, low noise and Maintenance-free and other benefits have been widely used in various fields such as household appliances, electric vehicles, air-conditioning systems, industrial equipment and military equipment.

However, different permanent magnet motors will have different performances due to variations in the manufacturing process or differences in winding sets. Even permanent magnet motors of the same batch and the same specifications will have slightly different operating parameters. Therefore, the difficulty and complexity of the motor control technology are increased, the control accuracy is reduced, and the overall control cost is increased.

Therefore, the main purpose of the present invention is to control the three-phase permanent magnet motor more accurately, and even if there are performance differences between the three-phase permanent magnet motors, the operating performance can be controlled more efficiently.

To achieve the above objective, the control device for a three-phase permanent magnet motor provided by the present invention includes a data processing unit, a storage unit, and a switching unit; the data processing unit is electrically connected to the three-phase permanent magnet motor; The storage unit is electrically connected to the data processing unit; the switching unit is electrically connected to the data processing unit, and the switching unit has a detection mode and an operation mode; when the switching unit is in the detection mode, the data processing unit detects The operating parameters of the three-phase permanent magnet motor are stored in the storage unit, and when the switching unit is in the operating mode, the three-phase permanent magnet motor is controlled to operate correspondingly, thereby controlling the three-phase more accurately Permanent magnet motors, even if there are performance differences between the various three-phase permanent magnet motors, the operating performance can be controlled more efficiently.

Preferably, when the switching unit is in the operating mode and activated for the first time, the data processing unit first detects the overall electrical error of the control device.

Preferably, a sensing device is further included therein, and the sensing device is electrically connected to the data processing unit to control the operating state of the motor.

Preferably, the sensing device is a thermostat.

The detailed architecture, features, or technical content provided by the present invention will be described in the detailed description of the subsequent embodiments. However, those with ordinary knowledge in the field of the present invention should be able to understand that the detailed description and the specific embodiments listed for implementing the present invention are only used to illustrate the present invention and not to limit the scope of the patent application of the present invention.

First of all, it should be noted that the terms used in this description are all exemplary description terms that can be understood by those with ordinary knowledge in the technical field. Various terms are only used to describe specific implementations and are not used to limit the scope of the present invention. For example, the quantifiers used in the scope of the patent application for invention include plural meanings. For example, the description of "an element" refers to one or more elements, and includes equivalent substitutions known to those with ordinary knowledge in the technical field.

All technical terms and conjunctions used in similar situations should also be understood as the broadest meanings. The specific electrical terms, connection relationships, and characteristic means or technical terms described in the description content should also be understood as including specific terms. Equivalent alternative means or technical terms that can achieve a function.

Hereinafter, the technical content and features of the present invention will be described in detail through the preferred embodiments listed in conjunction with the accompanying drawings. Therefore, the claimed scope is not limited to the content of the description. Furthermore, the present invention is mainly described with a three-phase permanent magnet motor, of course, it can also be applied to other motors of different specifications or types.

As shown in FIG. 1, a control device 20 for a three-phase permanent magnet motor 10 provided by a preferred embodiment of the present invention mainly includes a data processing unit 30, a storage unit 40, and a switch directly arranged on a single circuit board. The unit 50 is taken as an example. The circuit board is not limited to including the above-mentioned constituent units, and other circuit elements can also be provided according to application requirements, so that the control device 20 of the present invention can be directly connected to the three-phase permanent magnet motor 10 and drive and control program.

The data processing unit 30 of the preferred embodiment is an example of a microcontroller (Microcontrollers, MCU). The data processing unit 30 is electrically connected to the three-phase permanent magnet motor 10 through a circuit board and a connector.

The storage unit 40 of the preferred embodiment is an electronically-erasable programmable read-only memory (EEPROM) as an example. The storage unit 40 is disposed on the circuit board and is electrically connected to the data processing unit 30.

The switching unit 50 of the preferred embodiment is an example of a jumper or a switch. The switching unit 50 is electrically connected to the data processing unit 30, and the switching unit 50 has a detection mode and an operation mode. The switching unit 50 can be adjusted to a detection mode or an operation mode corresponding to the use state of the three-phase permanent magnet motor 10.

Using the above-mentioned components of the present invention, after the control device 20 is connected to the power supply 60 and directly connected to the three-phase permanent magnet motor 10, the switching unit 50 can be set to the detection mode first, and the data processing unit 30 detects the three-phase permanent magnet The operating parameters of the motor 10 are stored in the storage unit 40. Then set the switching unit 50 to the operating mode. When it is first started, the data processing unit 30 detects the overall electrical error (ADC offset) of the control device 20, which is used as a numerical control parameter of the motor to improve the accuracy of the control calculation , And then start the three-phase permanent magnet motor 10 normally and control its operation accordingly.

It is worth mentioning that the present invention can be equipped with a sensing device 70. In the preferred embodiment, the sensing device 70 is a thermostat as an example. When the sensing device 70 is electrically connected to the data processing of the control device 20 The unit 30 can be used as the operation control mechanism of the three-phase permanent magnet motor 10.

The present invention integrates the data processing unit 30, the storage unit 40 and other components on a single circuit board, not only can directly drive the three-phase permanent magnet motor 10, but the data processing unit 30 can also detect and store each three-phase The parameters of the permanent magnet motor 10 are used as the actual basis for the control calculation. The electrical error of the overall circuit board can also be calculated. This not only improves the accuracy of motor control, but also reduces the control cost, and can be more widely used. It is applied in various technical fields and fully utilizes its energy-saving effect to efficiently control the operating performance of three-phase permanent magnet motors.

10: Three-phase permanent magnet motor

20: control device

30: data processing unit

40: storage unit

50: switching unit

60: Power

70: sensing device

Fig. 1 is a schematic diagram of a preferred embodiment of the present invention.

10: Three-phase permanent magnet motor

20: control device

30: data processing unit

40: storage unit

50: switching unit

60: Power

70: sensing device

Claims (4)

A control device for a three-phase permanent magnet motor, the control device comprising: a data processing unit electrically connected to the three-phase permanent magnet motor; a storage unit electrically connected to the data processing unit; and a switching unit, electrical Is connected to the data processing unit, the switching unit has a detection mode and an operation mode, and the switching unit is adjusted to the detection mode or the operation mode in accordance with the use state of the three-phase permanent magnet motor; when the switching unit is the detection mode In the measurement mode, the data processing unit detects the operating parameters of the three-phase permanent magnet motor and stores the operating parameters in the storage unit. When the switching unit is in the operating mode, the three-phase permanent magnet motor is controlled to operate accordingly . The control device for a three-phase permanent magnet motor according to claim 1, wherein when the switching unit is in the operation mode and is started for the first time, the data processing unit first detects the overall electrical error of the control device. According to claim 1, the control device for a three-phase permanent magnet motor further includes a sensing device electrically connected to the data processing unit to control the running state of the motor. According to claim 3, the control device for a three-phase permanent magnet motor, wherein the sensing device is a temperature controller.

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