Connecting circuit of novel motor compatible with five-wire four-phase stepping motor

Abstract

The utility model discloses a novel motor compatible five-wire four-phase stepping motor connecting circuit comprising a main control board and a novel motor terminal J2, the main control board is provided with a terminal J1, and the terminal J1 comprises a power supply end and four output ends; the novel motor terminal J2 comprises a power supply end, a GND end and a PWM end, the power supply end of the novel motor terminal J2 is electrically connected with the power supply end of the terminal J1, the GND end of the novel motor terminal J2 is electrically connected with one or two or three output ends of the terminal J1, the main control board controls the one or two or three output ends of the terminal J1 to be grounded, the PWM end of the novel motor terminal J2 is electrically connected with the other output end of the terminal J1, and the PWM end of the novel motor terminal J2 is electrically connected with the other output end of the terminal J1. Cost is saved, and rapid application is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a novel connection circuit for a motor compatible with a 5-wire 4-phase stepper motor. Background Technology

[0002] Stepper motors have a wide range of applications, such as in the swing function of home appliances or automotive air conditioners, security monitoring, fluid control valves, temperature control, and ambient lighting. Traditional stepper motors are 5-wire, 4-phase motors, using a single pulse and one mechanical step to drive the load in a swinging / rotating motion, which cannot achieve smooth swing control. Technological improvements have led to the development of new 3-wire stepper motors, similar to BLDC motors, featuring quiet operation, soft start / stop, adjustable phase-locking force, precise step count, high efficiency, stall protection, and built-in overcurrent and overtemperature protection. The current problem is that the main control board of traditional 5-wire, 4-phase stepper motors has five terminals, corresponding to the power supply and four output lines, making it incompatible with the new motors. To match the new motors, the main control board needs to be modified. Modifying the main control board requires redesigning the mold and changing material codes, resulting in high costs and a complex process. Utility Model Content

[0003] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art and to provide a new type of connection circuit for a motor compatible with a 5-wire 4-phase stepper motor.

[0004] The connection circuit for a novel motor compatible with a 5-wire 4-phase stepper motor according to an embodiment of the present invention includes: a main control board and a novel motor terminal J2. The main control board is provided with a terminal J1, which includes a power supply terminal and four output terminals. The novel motor terminal J2 includes a power supply terminal, a GND terminal, and a PWM terminal. The power supply terminal of the novel motor terminal J2 is electrically connected to the power supply terminal of the terminal J1. The GND terminal of the novel motor terminal J2 is electrically connected to one, two, or three output terminals of the terminal J1. The main control board grounds one, two, or three output terminals of the terminal J1. The PWM terminal of the novel motor terminal J2 is electrically connected to another output terminal of the terminal J1.

[0005] According to some embodiments of the present invention, the main control board includes a main control MCU and a driver chip U1. The four input pins IN1 to IN4 of the driver chip U1 are electrically connected to the main control MCU to amplify the control signal output by the main control MCU. The four output pins OUT1 to OUT4 of the driver chip U1 are electrically connected to the four output terminals of terminal J1 to transmit the amplified control signal to the new motor terminal J2.

[0006] According to some embodiments of this utility model, the main control MCU controls one or two or three input pins (e.g., IN1 to IN3) of the drive chip U1 to be set to high level in the initial stage of power-on, so that one or two or three output pins (e.g., OUT1 to OUT3) of the drive chip U1 are grounded, and one or two or three output terminals of the terminal J1 are grounded.

[0007] According to some embodiments of the present invention, one input pin (e.g., IN4) and one output pin (e.g., OUT4) of the driver chip U1 control the PWM terminal of the novel motor terminal J2 through terminal J1.

[0008] According to some embodiments of this utility model, the main control board includes a main control MCU and four drive circuits. The four input terminals of the four drive circuits are electrically connected to the corresponding IO ports of the main control MCU. One, two, or three output terminals of the four drive circuits are electrically connected to the corresponding ports of terminal J1 to control one, two, or three output terminals of terminal J1 to be grounded. Another output terminal of the four drive circuits is electrically connected to another port of terminal J1 to transmit control signals to the PWM terminal of the novel motor terminal J2.

[0009] According to some embodiments of the present invention, each driving circuit includes a switch Q1 and a diode D1. The control terminal of the switch Q1 is electrically connected to the corresponding I / O port of the main control MCU via a series resistor. The positive terminal of the switch Q1 is electrically connected to the positive terminal of the diode D1 and the corresponding port of the terminal J1, respectively. The negative terminal of the switch Q1 is grounded.

[0010] The compatible circuit of the 5-wire 4-phase motor main control board according to the embodiment of this utility model has at least the following beneficial effects: by electrically connecting the power supply terminal of the new motor terminal J2 to the power supply terminal of terminal J1, the power supply terminal of the new motor is powered; the control program of the main control board can ground one, two, or three output terminals of terminal J1, thereby grounding the ground terminal of the new motor; by electrically connecting the PWM terminal of the new motor terminal J2 to another output terminal (e.g., OUT4) of terminal J1, the PWM terminal of the new motor has a control signal, thus eliminating the need to modify the hardware of the traditional main control board, making the new motor terminal J2 compatible with the terminal J1 on the main control board of the traditional stepper motor only by modifying the control logic, saving costs and facilitating rapid application.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings;

[0013] Figure 1 It is one of the circuit schematics connecting the circuits;

[0014] Figure 2 This is the second circuit schematic diagram of the connecting circuit. Detailed Implementation

[0015] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0018] Reference Figure 1 and Figure 2This utility model discloses a novel connection circuit for a 5-wire, 4-phase stepper motor compatible with a main control board 10, and a novel motor terminal J2 connected to the novel motor. The main control board has a terminal J1 (terminal J1 generally uses a pin header for insertion and mating with the novel motor terminal J2). Terminal J1 includes a power supply terminal and four output terminals. The novel motor terminal J2 includes a power supply terminal, a GND terminal, and a PWM terminal. It should be noted that the novel motor terminal J2 can be a three-wire terminal or a five-wire terminal (this facilitates one-to-one insertion and mating with the pins of terminal J1). For the five-wire novel motor terminal J2, two of the output terminals can be floating or grounded. For the three-wire novel motor terminal J2, its outer casing size must be compatible with the insertion of terminal J1, but it only needs to have three pins internally. The power supply terminal of the new motor terminal J2 is electrically connected to the power supply terminal of terminal J1. The main control board 10 controls one, two, or three output terminals of terminal J1 to be grounded (for example, when controlling one output terminal to be grounded, the other two output terminals can be left floating). The PWM terminal of the new motor terminal J2 is electrically connected to the other output terminal of terminal J1.

[0019] In other words, by electrically connecting the power supply terminal of the new motor terminal J2 to the power supply terminal of terminal J1, the actual operating voltage obtained by the new motor is made to be identical to the coil voltage obtained by the traditional 5-wire 4-phase stepper motor. The control program of the main control board can pull down the potential of one, two, or three output terminals of terminal J1 to make them close to the ground potential, which is equivalent to grounding. Since one, two, or three output terminals of terminal J1 are electrically connected to the GND terminal of the new motor terminal J2, the grounding terminal of the new motor is grounded. By electrically connecting the PWM terminal of the new motor terminal J2 to the fourth output terminal of terminal J1, the output terminal of the new motor has a control signal. Therefore, without modifying the hardware of the traditional main control board, the new motor terminal J2 is compatible with the terminal J1 on the main control board of the traditional stepper motor, saving costs and facilitating rapid application.

[0020] like Figure 1The main control board 10 includes a main control MCU and a driver chip U1 (both the main control MCU and the driver chip U1 adopt existing technologies, with the driver chip U1 generally using a ULN2003 chip). The four input pins IN1 to IN4 of the driver chip U1 are electrically connected to the main control MCU, and the four output pins OUT1 to OUT4 of the driver chip U1 are electrically connected to the four output terminals of terminal J1 to transmit signals to the new motor terminal J2. The main control MCU controls one, two, or three input pins (IN1 to IN3) of the driver chip U1 to be set to a high level at the initial power-on stage, causing one, two, or three output pins (OUT1 to OUT3) of the driver chip U1 to output a low level close to ground potential, thereby grounding one, two, or three output terminals of terminal J1, and thus grounding the GND terminal of the new motor terminal J2. The input pins (e.g., IN4) and output pins (e.g., OUT4) of the driver chip U1 output control signals through terminal J1 to control the PWM terminal of the new motor terminal J2. The required single-channel drive pulse frequency can be close to the actual PPS value of the motor (PPS refers to the rate of change per second). Furthermore, it is no longer necessary for the main control MCU to use 4 IO ports to handle complex issues such as motor commutation, step sequence, and step calculation. Only one IO port (e.g., IN4) is needed.

[0021] like Figure 2 In some embodiments, the main control board includes a main control MCU and four drive circuits 20. The four input terminals of the four drive circuits 20 are electrically connected to the corresponding I / O ports of the main control MCU. The voltage of the common terminal of the four drive circuits 20 is typically 5–36V, with 5V, 12V, and 24V being more common. One, two, or three output terminals of the four drive circuits 20 are electrically connected to the corresponding ports of terminal J1 to control one, two, or three output terminals of terminal J1 to approach ground potential. Another output terminal of the four drive circuits 20 is electrically connected to another port of terminal J1 to transmit control signals to the PWM terminal of the new motor terminal J2. Specifically, each drive circuit includes a switch Q1 and a diode D1. The control terminal of the switch Q1 is electrically connected to the corresponding I / O port of the main control MCU. The positive terminal of the switch Q1 is electrically connected to the positive terminal of the diode D1 and the corresponding port of terminal J1. The negative terminal of the switch Q1 is grounded. The diode D1 is used to release back electromotive force to protect the switch. The main control MCU controls one, two, or three input terminals of the four drive circuits to be set to a high level at the initial power-on stage, so that one, two, or three output terminals of the drive circuit are close to ground potential, and one, two, or three output terminals of terminal J1 are grounded, thereby grounding the GND terminal of the new motor terminal J2.

[0022] It will be readily understood by those skilled in the art that the above preferred methods can be freely combined and superimposed without conflict.

[0023] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A novel connection circuit for a motor compatible with a 5-wire 4-phase stepper motor, characterized in that, include: The main control board (10) and the new motor terminal J2 are provided on the main control board (10). The terminal J1 includes a power supply terminal and four output terminals. The new motor terminal J2 includes a power supply terminal, a GND terminal, and a PWM terminal. The power supply terminal of the new motor terminal J2 is electrically connected to the power supply terminal of terminal J1. The GND terminal of the new motor terminal J2 is electrically connected to one, two, or three output terminals of terminal J1. One, two, or three output terminals of the main control board control terminal J1 are grounded. The PWM terminal of the new motor terminal J2 is electrically connected to another output terminal of terminal J1.

2. The connection circuit for a novel motor compatible with a 5-wire 4-phase stepper motor according to claim 1, characterized in that: The main control board (10) includes a main control MCU and a driver chip U1. The four input pins IN1 to IN4 of the driver chip U1 are electrically connected to the main control MCU, and the four output pins OUT1 to OUT4 of the driver chip U1 are electrically connected to the terminal J1 to transmit power and signals to the new motor terminal J2.

3. The connection circuit for a novel motor compatible with a 5-wire 4-phase stepper motor according to claim 2, characterized in that: The main control MCU controls one, two, or three input pins of the driver chip U1 to be set to a high level at the initial power-on stage, which causes one, two, or three output pins of the driver chip U1 to be grounded, and causes one, two, or three output terminals of terminal J1 to be grounded.

4. The connection circuit for a novel motor compatible with a 5-wire 4-phase stepper motor according to claim 3, characterized in that: One input pin and one output pin of the driver chip U1 control the PWM terminal of the new motor terminal J2 through terminal J1.

5. The connection circuit for a novel motor compatible with a 5-wire 4-phase stepper motor according to claim 1, characterized in that: The main control board (10) includes a main control MCU and a 4-way drive circuit (20). The four input terminals of the 4-way drive circuit (20) are electrically connected to the corresponding IO ports of the main control MCU. One, two, or three output terminals of the 4-way drive circuit (20) are electrically connected to the corresponding ports of terminal J1 to control one, two, or three output terminals of terminal J1 to be grounded. Another output terminal of the 4-way drive circuit (20) is electrically connected to another port of terminal J1 to transmit control signals to the PWM terminal of the new motor terminal J2.

6. The connection circuit for a novel motor compatible with a 5-wire 4-phase stepper motor according to claim 5, characterized in that: Each drive circuit includes a switch Q1 and a diode D1. The control terminal of the switch Q1 is electrically connected to the corresponding I / O port of the main control MCU. The positive terminal of the switch Q1 is electrically connected to the positive terminal of the diode D1 and the corresponding port of the terminal J1. The negative terminal of the switch Q1 is grounded.

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