Drive circuit of direct current stepping motor

Abstract

The utility model discloses a drive circuit of a DC stepping motor. A controller is respectively connected with base electrodes of a triode Q3A, a triode Q3B, a triode Q4A, a triode Q4B, a triode Q5A, a triode Q5B, a triode Q6A and a triode Q6B; the base electrode of the triode Q1A is connected to the collector electrode of the triode Q3B, the base electrode of the triode Q1B is connected to the collector electrode of the triode Q3A, the base electrode of the triode Q2A is connected to the collector electrode of the triode Q4B, and the base electrode of the triode Q2B is connected to the collector electrode of the triode Q4B; and the power supply is respectively connected with emitters of the triode Q1A, the triode Q1B, the triode Q2A and the triode Q2B. The triodes form efficient control logic in the circuit, the optimized transistors have strict turn-on and turn-off sequences, energy loss can be reduced, compared with a traditional drive circuit, higher energy efficiency is achieved under high-frequency operation, the precision of the circuit for controlling each phase sequence of the stepping motor is improved, the control is high in flexibility, and the circuit is suitable for large-scale popularization and application. And the optimal working state can be kept under various working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of drive circuits, in particular to a drive circuit for a DC stepping motor. Background Art

[0002] At present, two-phase four-wire stepper motors are widely used in electric components of new energy vehicles. Due to their own mechanical structure and working principle, stepper motors have strong operating vibration and noise when working normally, which makes the customer experience of new energy vehicles poor. In order to ensure customer experience, high-cost brushless motors are needed to solve this problem. This cost puts a great pressure on customers.

[0003] In addition, most of the stepper motor drivers on the market are integrated driver chips. Integrated driver chips are highly integrated and highly standardized. Although they improve the reliability of the drive system, they also solidify some electrical parameters. Most automotive products are customized products and non-standard parts, which leads to the inability of integrated driver chips to meet customers' special application requirements. In addition, traditional driver chips are often less efficient at high-frequency switching, resulting in greater energy loss, which affects the performance of the motor and the reliability of the system. Secondly, traditional circuits may not be able to provide sufficient current and voltage control accuracy, thus affecting the positioning accuracy and stability of the stepper motor.

[0004] Due to the lack of flexible control strategies, traditional drive circuits are difficult to adapt to different working conditions and requirements, limiting the application range of stepper motors. It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a driving circuit for a DC stepping motor, so as to solve the problem that the driving effect of the driving circuit for the stepping motor in the prior art is poor.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a driving circuit of a DC stepping motor, used for driving a stepping motor, comprising a power supply, a transistor Q1A, a transistor Q1B, a transistor Q2A, a transistor Q2B, a transistor Q3A, a transistor Q3B, a transistor Q4A, a transistor Q4B, a transistor Q5A, a transistor Q5B, a transistor Q6A, a transistor Q6B and a controller: the controller is respectively connected to the transistors Q3A, Q3B, Q4A, Q4B, and the transistors Q4A, Q4B, and the transistors Q5A, Q5B, and the transistors Q6A, Q6B. The bases of transistors Q5A, Q5B, Q6A and Q6B are connected; the base of the transistor Q1A is connected to the collector of the transistor Q3B, the base of the transistor Q1B is connected to the collector of the transistor Q3A, the base of the transistor Q2A is connected to the collector of the transistor Q4B, and the base of the transistor Q2B is connected to the collector of the transistor Q4B; the power supply is respectively connected to the emitters of the transistors Q1A, Q1B, Q2A and Q2B.

[0007] In an embodiment of the present invention, the collectors of the transistor Q5A, the transistor Q5B, the transistor Q6A, and the transistor Q6B are electrically connected to the stepping motor respectively.

[0008] In an embodiment of the present invention, the emitter of the transistor Q3B is connected to the base of the transistor Q5A, and the emitter of the transistor Q3A is connected to the base of the transistor Q5B.

[0009] In an embodiment of the present invention, emitters of the transistor Q5A, the transistor Q5B, the transistor Q6A, and the transistor Q6B are grounded respectively.

[0010] In an embodiment of the present invention, the transistor Q1A, the transistor Q1B, the transistor Q2A, and the transistor Q2B are all PNP transistors.

[0011] In an embodiment of the present invention, the transistors Q3A, Q3B, Q4A, Q4B, Q5A, Q5B, Q6A, and Q6B are all NPN transistors.

[0012] In an embodiment of the present invention, the controller is an MCU controller.

[0013] In an embodiment of the present invention, the stepper motor is a two-phase four-wire stepper motor.

[0014] As described above, the driving circuit of the DC stepper motor of the utility model has the following beneficial effects: the bases of the transistors Q1A and Q1B are respectively connected to the collectors of the transistors Q3B and Q3A, forming an efficient control logic, and the optimized transistors have a strict on-and-off sequence, which can reduce energy loss. Compared with traditional driving circuits, it has higher energy efficiency under high-frequency operation, improves the accuracy of the circuit's control of each phase sequence of the stepper motor, and makes its control highly flexible, and can adjust the control strategy to meet different application requirements, so that the stepper motor can maintain the optimal working state under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The utility model provides a circuit diagram of a driving circuit of a DC stepping motor. DETAILED DESCRIPTION

[0017] The utility model provides a driving circuit for a DC stepping motor. To make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail below with reference to the accompanying drawings and examples.

[0018] In the description of the present invention, it should be understood that the terms "up, down, left, right, etc." indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and should not be understood as limiting the present invention; in addition, the terms "installation" and "connection" should be understood in a broad sense, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0019] See also Figure 1The utility model provides a driving circuit of a DC stepping motor, which is used to drive the stepping motor, and includes a power supply, a transistor Q1A, a transistor Q1B, a transistor Q2A, a transistor Q2B, a transistor Q3A, a transistor Q3B, a transistor Q4A, a transistor Q4B, a transistor Q5A, a transistor Q5B, a transistor Q6A, a transistor Q6B and a controller: the controller is respectively connected to the transistors Q3A, Q3B, Q4A, Q4B, Q5A, Q3B, and Q6A. The bases of the transistors Q5B, Q6A and Q6B are connected; the base of the transistor Q1A is connected to the collector of the transistor Q3B, the base of the transistor Q1B is connected to the collector of the transistor Q3A, the base of the transistor Q2A is connected to the collector of the transistor Q4B, and the base of the transistor Q2B is connected to the collector of the transistor Q4B; the power supply is respectively connected to the emitters of the transistors Q1A, Q1B, Q2A and Q2B.

[0020] The collectors of the transistors Q5A, Q5B, Q6A and Q6B are electrically connected to the stepper motors respectively; the emitter of the transistor Q3B is connected to the base of the transistor Q5A, and the emitter of the transistor Q3A is connected to the base of the transistor Q5B; the emitters of the transistors Q5A, Q5B, Q6A and Q6B are grounded respectively. Optionally, the transistors Q1A, Q1B, Q2A and Q2B are all PNP transistors; the transistors Q3A, Q3B, Q4A, Q4B, Q5A, Q5B, Q6A and Q6B are all NPN transistors.

[0021] In this embodiment, the controller is an MCU controller, and the stepper motor is a two-phase four-wire stepper motor. Figure 1 In detail, the collectors of the transistor Q1A and the transistor Q1B are respectively connected to two terminals on one coil of the stepper motor, and the collectors of the transistor Q2A and the transistor Q2B are respectively connected to two terminals on the other coil of the stepper motor.

[0022] In addition, it is understandable that the price of transistors is lower than that of integrated driver chips. Compared with conventional stepper motors that use driver chips for driving and control, using transistors for driving can reduce costs.

[0023] In summary, in the driving circuit of the DC stepper motor of the utility model, the bases of transistors Q1A and Q1B are connected to the collectors of transistors Q3B and Q3A respectively, forming an efficient control logic, and the optimized transistors have a strict on and off sequence, which can reduce energy loss. Compared with the traditional driving circuit, it has higher energy efficiency under high-frequency operation, improves the accuracy of the circuit's control of each phase sequence of the stepper motor, makes its control highly flexible, and can adjust the control strategy to meet different application requirements, so that the stepper motor can maintain the optimal working state under various working conditions. Therefore, the utility model effectively overcomes the various shortcomings of the prior art and has a high industrial utilization value.

[0024] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A driving circuit for a DC stepping motor, used to drive a stepping motor, characterized in that: Including power supply, transistor Q1A, transistor Q1B, transistor Q2A, transistor Q2B, transistor Q3A, transistor Q3B, transistor Q4A, transistor Q4B, transistor Q5A, transistor Q5B, transistor Q6A, transistor Q6B and controller: The controller is connected to the bases of the transistors Q3A, Q3B, Q4A, Q4B, Q5A, Q5B, Q6A and Q6B respectively; the base of the transistor Q1A is connected to the collector of the transistor Q3B, the base of the transistor Q1B is connected to the collector of the transistor Q3A, the base of the transistor Q2A is connected to the collector of the transistor Q4B, and the base of the transistor Q2B is connected to the collector of the transistor Q4B; the power supply is connected to the emitters of the transistors Q1A, Q1B, Q2A and Q2B respectively.

2. The driving circuit of the DC stepping motor according to claim 1, characterized in that: The collectors of the transistor Q5A, the transistor Q5B, the transistor Q6A, and the transistor Q6B are electrically connected to the stepping motors respectively.

3. The driving circuit of the DC stepping motor according to claim 1, characterized in that: The emitter of the transistor Q3B is connected to the base of the transistor Q5A, and the emitter of the transistor Q3A is connected to the base of the transistor Q5B.

4. The driving circuit of the DC stepping motor according to claim 1, characterized in that: The emitters of the transistor Q5A, the transistor Q5B, the transistor Q6A, and the transistor Q6B are grounded respectively.

5. The driving circuit of the DC stepping motor according to claim 1, characterized in that: The transistor Q1A, the transistor Q1B, the transistor Q2A, and the transistor Q2B are all PNP transistors.

6. The driving circuit of the DC stepping motor according to claim 1, characterized in that: The transistor Q3A, the transistor Q3B, the transistor Q4A, the transistor Q4B, the transistor Q5A, the transistor Q5B, the transistor Q6A, and the transistor Q6B are all NPN transistors.

7. The driving circuit of the DC stepping motor according to claim 1, characterized in that: The controller is an MCU controller.

8. The driving circuit of the DC stepping motor according to claim 1, characterized in that: The stepper motor is a two-phase four-wire stepper motor.

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