CN204633666U - A high-speed switched reluctance motor control device for electric tools - Google Patents

Abstract

The utility model discloses a kind of electric tool High speed SRM control device, comprise main control unit and High speed SRM, described main control unit is connected with drive circuit, described drive circuit is connected with power inverter, described power inverter is connected with described High speed SRM, position detecting module and current detection module is also connected with between described main control unit and described High speed SRM, described main control unit is also connected with power module, and described High speed SRM is also connected with power tool load.The utility model circuit is simple, and cost is low, and Driving Torque is constant, and output speed fluctuation is little, convenient and practical, high financial profit.

Description

A high-speed switched reluctance motor control device for electric tools

technical field

The utility model relates to a motor, more specifically a high-speed switched reluctance motor control device for electric tools.

Background technique

At present, domestic motors for electric tools mainly use brushed DC series motors and AC series motors. This brush structure makes power tools poor in reliability and short in service life. Usually, brushes and commutation need to be replaced after more than 100 hours of work. device. There are also permanent magnet brushless DC motors and AC variable frequency asynchronous motors used as drive motors for electric tools. The high-speed performance of AC variable frequency asynchronous motors is not good, and it is difficult to achieve small size and light weight of the motor. Complex, permanent magnets have demagnetization, which limits their application in power tools. Switched reluctance motor (SR motor) is a new type of speed-regulating motor that has emerged with the development of modern power electronics technology and control technology. It is a typical brushless motor and has the advantages of low cost, high fault tolerance, and high reliability. , and the structure is simple and firm, and the cooling is convenient. It has good adaptability to harsh environments such as high temperature, and is suitable for high-speed motor operation.

Utility model content

Purpose of the utility model: The purpose of this utility model is to provide a control device for high-speed switched reluctance motors used in electric tools. The control device has simple circuit, low cost, constant output torque, small output speed fluctuation, and low cost high.

Technical solution: A high-speed switched reluctance motor control device for electric tools described in the utility model includes a main control unit and a high-speed switched reluctance motor, the main control unit is connected with a drive circuit, and the drive circuit is connected with a power converter, the power converter is connected to the high-speed switched reluctance motor, a position detection module and a current detection module are connected between the main control unit and the high-speed switched reluctance motor, and the main control unit is also A power module is connected, and the high-speed switched reluctance motor is also connected with an electric tool load.

Further, the main control unit is composed of STC12C5A60S2 single-chip microcomputer and its peripheral circuits to realize constant speed control of the high-speed switched reluctance motor.

Further, the drive circuit is composed of a drive chip IR2110, which drives the phase windings of the high-speed switched reluctance motor on and off.

Further, the current detection module is composed of several precision voltage dividing resistors to realize the closed-loop control of the phase current of the high-speed switched reluctance motor.

Further, the position detection module is composed of a photoelectric sensor and a code disc, and realizes closed-loop control of the position of the high-speed switched reluctance motor.

Further, the power converter adopts a single-winding double-switch power converter to form a main circuit, which provides phase winding current of a high-speed switched reluctance motor.

Beneficial effects: the utility model has the advantages of simple circuit, low cost, constant output torque, small output speed fluctuation, convenience and practicality, and high economic benefit.

Description of drawings

Figure 1 is a schematic block diagram of the control principle structure of the utility model.

Detailed ways

The preferred examples of the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the utility model can be more easily understood by those skilled in the art, so as to define the protection scope of the utility model more clearly.

A high-speed switched reluctance motor control device for an electric tool as shown in Figure 1 includes a main control unit and a high-speed switched reluctance motor, the main control unit is connected to a drive circuit, and the drive circuit is connected to a power converter, The power converter is connected to the high-speed switched reluctance motor, a position detection module and a current detection module are connected between the main control unit and the high-speed switched reluctance motor, and the main control unit is also connected to a power supply module, the high-speed switched reluctance motor is also connected with an electric tool load.

As a further optimization of the above-mentioned technical solution, the main control unit of the high-speed switched reluctance motor for the electric tool uses a STC12C5A60S2 single-chip microcomputer, which has its own PWM output, and has strong anti-interference ability, and programming realizes constant speed control of the high-speed switched reluctance motor The motor drive module is composed of a drive chip, and the drive chip selects the IR2110 chip to drive the phase winding of the high-speed switched reluctance motor on and off; the current and position detection modules are composed of precision voltage divider resistors, photoelectric sensors and code discs to realize For the closed-loop control of the phase current and position of the motor, the power converter adopts a single-winding double-switch power converter to form a main circuit to provide the phase winding current of the high-speed switched reluctance motor.

The single-chip microcomputer of the main control unit processes the current information and position information detected by the position sensor, outputs the control drive chip, and then controls the on-off of the power switch tube to ensure the constant torque and speed of electric output.

The utility model discloses a high-speed switched reluctance motor control device for electric tools. The high-speed switched reluctance motor control device for electric tools has reasonable design, simple circuit, constant output torque, small output speed fluctuation, and high performance-price ratio. It has high practical value.

The above is only one of the specific embodiments of the present utility model, but the scope of protection of the present utility model is not limited thereto. Any changes or replacements that come to mind should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be determined by the protection scope defined in the claims.

Claims (6)

1. an electric tool High speed SRM control device, it is characterized in that: comprise main control unit and High speed SRM, described main control unit is connected with drive circuit, described drive circuit is connected with power inverter, described power inverter is connected with described High speed SRM, position detecting module and current detection module is also connected with between described main control unit and described High speed SRM, described main control unit is also connected with power module, and described High speed SRM is also connected with power tool load.

2. a kind of electric tool High speed SRM control device according to claim 1, is characterized in that: described main control unit is made up of STC12C5A60S2 single-chip microcomputer and peripheral circuit thereof, realizes the fixed speed control to High speed SRM.

3. a kind of electric tool High speed SRM control device according to claim 1, is characterized in that: described drive circuit is made up of driving chip IR2110, drives the phase winding break-make of High speed SRM.

4. a kind of electric tool High speed SRM control device according to claim 1, is characterized in that: described current detection module is made up of some accurate divider resistances, realizes the closed-loop control to High speed SRM phase current.

5. a kind of electric tool High speed SRM control device according to claim 1, is characterized in that: described position detecting module is made up of photoelectric sensor and code-disc, realizes the closed-loop control of the position to High speed SRM.

6. a kind of electric tool High speed SRM control device according to claim 1, is characterized in that: described power inverter adopts simplex winding biswitch type power inverter to form main circuit.