Low-power driving circuit of running machine

Abstract

The utility model provides a low-power driving circuit of a treadmill, and relates to the field of driving circuits, the low-power driving circuit of the treadmill comprises a processor U1, a rectifier bridge, a PWM control circuit, a protection circuit, a driving power supply and a motor, the eighth interface of the processor U1 is connected with the driving power supply, and the eighth interface of the processor U1 is connected with the motor. A sixteenth interface of the processor U1 is connected with a first interface of the rectifier bridge, a twenty-seventh interface of the processor U1 is connected with a second interface of the rectifier bridge, the protection circuit is respectively connected with an output end of the PWM control circuit and a third interface of the rectifier bridge, a fourth interface of the rectifier bridge is connected with a negative electrode of the motor, and a fifth interface of the rectifier bridge is connected with a negative electrode of the motor. According to the utility model, on the basis of the motor driving circuit, the PWM control circuit and the protection circuit are added, the overall circuit design is simple, the manufacturing cost is low, the power consumption is low, the control circuit can be applied to the treadmill, and the production cost of the treadmill is reduced.

Description

Technical Field

[0001] This application relates to the field of drive circuits, and more particularly, to a low-power drive circuit for a treadmill. Background Art

[0002] The treadmill circuit is a circuit system composed of multiple electronic components, mainly including a motor control circuit, a display screen drive circuit, a safety protection circuit, etc. Through the control of these circuits, functions such as starting, stopping, speed regulation, timing, and cumulative mileage of the treadmill can be achieved.

[0003] Currently, the drive circuit of the treadmill has a complex design, a high manufacturing cost, and a high power consumption. Therefore, it is necessary to improve the current drive circuit. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a low-power drive circuit for a treadmill, which can solve the above technical problems.

[0005] The embodiments of this application provide a low-power drive circuit for a treadmill, including a processor U1, a rectifier bridge, a PWM control circuit, a protection circuit, a drive power supply, and a motor. The eighth interface of the processor U1 is connected to the drive power supply, the sixteenth interface of the processor U1 is connected to the first interface of the rectifier bridge, the twenty-seventh interface of the processor U1 is connected to the second interface of the rectifier bridge, the protection circuit is respectively connected to the output end of the PWM control circuit and the third interface of the rectifier bridge, the fourth interface of the rectifier bridge is connected to the negative pole of the motor, and the output end of the protection circuit is connected to the positive pole of the motor.

[0006] Preferably, the PWM control circuit includes a processor U2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, and a resistor R2. The first interface of the processor U2 is connected to the sixteenth interface of the processor U2. One end of the capacitor C1 is connected to the second interface of the processor U2, and the other end of the capacitor C1 is connected to the third interface of the processor U2. One end of the capacitor C2 is connected to the second interface of the processor U2, and the other end of the capacitor C2 is connected to one end of the capacitor C3. The other end of the capacitor C3 is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the third interface of the processor U2. One end of the capacitor C4 is connected to the fifth interface of the processor U2, and the other end of the capacitor C4 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to the sixth interface of the processor U2. The other end of the capacitor C4 and one end of the resistor R2 are both grounded. The fourth interface, the seventh interface, and the thirteenth interface of the processor are all grounded. The tenth interface of the processor is connected to the protection circuit.

[0007] Preferably, the model of the processor U2 is TL494.

[0008] Preferably, a feedback circuit is provided between the motor and the PWM control circuit. The input end of the feedback circuit is connected to the motor, and the output end of the feedback circuit is respectively connected to the fifteenth interface and the sixteenth interface of the processor U2.

[0009] Preferably, the model of the processor U1 is IR2130D.

[0010] Preferably, the protection circuit includes an MOS transistor Q1, a resistor R3, a resistor R4, and a diode D1. The D pole of the MOS transistor Q1 is connected to the second interface of the rectifier bridge. The G pole of the MOS transistor Q1 is connected to one end of the resistor R3. The other end of the resistor R3 is connected to the PWM control circuit. The S pole of the MOS transistor Q1 is connected to the positive pole of the motor. The input end of the diode D1 is connected to the negative pole of the motor, and the output end of the diode D1 is connected to the positive pole of the motor.

[0011] Preferably, the protection circuit further includes a switch, which is arranged between the resistor R4 and the positive pole of the motor.

[0012] Advantages of the present utility model:

[0013] A low-power drive circuit for a treadmill provided by the present utility model includes a processor U1, a rectifier bridge, a PWM control circuit, a protection circuit, a drive power supply, and a motor. The eighth interface of the processor U1 is connected to the drive power supply. The sixteenth interface of the processor U1 is connected to the first interface of the rectifier bridge. The twenty-seventh interface of the processor U1 is connected to the second interface of the rectifier bridge. The protection circuit is respectively connected to the output end of the PWM control circuit and the third interface of the rectifier bridge. The fourth interface of the rectifier bridge is connected to the negative pole of the motor. The output end of the protection circuit is connected to the positive pole of the motor. Based on the motor drive circuit, the present utility model adds a PWM control circuit and a protection circuit. The overall circuit design is simple, the manufacturing cost is relatively low, and the power consumption is relatively low. It can be applied to a treadmill to reduce the production cost of the treadmill. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 This is the circuit schematic diagram of the present utility model. Detailed implementation manners

[0016] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the scope of protection of the present application.

[0018] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of this application is usually placed. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0020] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0021] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0022] As Figure 1 shown, a low-power drive circuit for a treadmill includes a processor U1, a rectifier bridge, a PWM control circuit, a protection circuit, a drive power supply, and a motor. The eighth interface of the processor U1 is connected to the drive power supply. The sixteenth interface of the processor U1 is connected to the first interface of the rectifier bridge. The twenty-seventh interface of the processor U1 is connected to the second interface of the rectifier bridge. The protection circuit is respectively connected to the output end of the PWM control circuit and the third interface of the rectifier bridge. The fourth interface of the rectifier bridge is connected to the negative pole of the motor. The output end of the protection circuit is connected to the positive pole of the motor. Based on the motor drive circuit, the present utility model adds a PWM control circuit and a protection circuit. Compared with the existing drive circuit, the overall circuit design is simple, the manufacturing cost is low, and the power consumption is low. It can be applied to a treadmill to reduce the production cost of the treadmill.

[0023] In this embodiment, the PWM control circuit includes a processor U2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, and a resistor R2. The first interface of the processor U2 is connected to the sixteenth interface of the processor U2. One end of the capacitor C1 is connected to the second interface of the processor U2, and the other end of the capacitor C1 is connected to the third interface of the processor U2. One end of the capacitor C2 is connected to the second interface of the processor U2, and the other end of the capacitor C2 is connected to one end of the capacitor C3. The other end of the capacitor C3 is connected to one end of the resistor R1. The other end of the resistor R1 is connected to the third interface of the processor U2. One end of the capacitor C4 is connected to the fifth interface of the processor U2, and the other end of the capacitor C4 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to the sixth interface of the processor U2. The other end of the capacitor C4 and one end of the resistor R2 are both grounded. The fourth interface, the seventh interface, and the thirteenth interface of the processor are all grounded. The tenth interface of the processor is connected to the protection circuit.

[0024] In this embodiment, the model of the processor U2 is TL494.

[0025] The PWM control circuit of the present utility model generates a control signal to control the motor through a protection circuit.

[0026] In this embodiment, a feedback circuit is provided between the motor and the PWM control circuit. The input end of the feedback circuit is connected to the motor, and the output end of the feedback circuit is respectively connected to the fifteenth interface and the sixteenth interface of the processor U2. The feedback circuit of the present utility model includes a photoelectric sensor, which is obtained through the digital pulse signal of the photoelectric sensor. The photoelectric sensor is installed on a code disk coaxial with the motor, and its pulse frequency directly reflects the rotational speed of the motor. Similarly, the digital pulse signal is also converted into an analog signal.

[0027] In this embodiment, the model of the processor U1 is IR2130D. IR2130 is a high-voltage and high-speed power MOSFET and IGBT driver with a working voltage of 10 - 20V and three independent high-side and low-side output channels respectively.

[0028] In this embodiment, the protection circuit includes a MOS transistor Q1, a resistor R3, a resistor R4, and a diode D1. The D pole of the MOS transistor Q1 is connected to the second interface of the rectifier bridge. The G pole of the MOS transistor Q1 is connected to one end of the resistor R3. The other end of the resistor R3 is connected to the PWM control circuit. The S pole of the MOS transistor Q1 is connected to the positive pole of the motor. The input end of the diode D1 is connected to the negative pole of the motor, and the output end of the diode D1 is connected to the positive pole of the motor.

[0029] In this embodiment, the protection circuit further includes a switch, which is arranged between the resistor R4 and the positive pole of the motor and is closed after the electric treadmill starts running.

[0030] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A treadmill low-power drive circuit, characterized in that: It includes a processor U1, a rectifier bridge, a PWM control circuit, a protection circuit, a driving power supply and a motor. The eighth interface of the processor U1 is connected to the driving power supply, the sixteenth interface of the processor U1 is connected to the first interface of the rectifier bridge, the twenty-seventh interface of the processor U1 is connected to the second interface of the rectifier bridge, the protection circuit is respectively connected to the output end of the PWM control circuit and the third interface of the rectifier bridge, the fourth interface of the rectifier bridge is connected to the negative pole of the motor, and the output end of the protection circuit is connected to the positive pole of the motor.

2. A treadmill low-power drive circuit according to claim 1, characterized in that: The PWM control circuit includes a processor U2, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a resistor R1, and a resistor R2. The first interface of the processor U2 is connected to the sixteenth interface of the processor U2, one end of the capacitor C1 is connected to the second interface of the processor U2, the other end of the capacitor C1 is connected to the third interface of the processor U2, one end of the capacitor C2 is connected to the second interface of the processor U2, the other end of the capacitor C2 is connected to one end of the capacitor C3, the other end of the capacitor C3 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the third interface of the processor U2, one end of the capacitor C4 is connected to the fifth interface of the processor U2, the other end of the capacitor C4 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to the sixth interface of the processor U2, the other end of the capacitor C4 and one end of the resistor R2 are both grounded, the fourth interface, the seventh interface, and the thirteenth interface of the processor U2 are all grounded, and the tenth interface of the processor is connected to the protection circuit.

3. A treadmill low-power drive circuit according to claim 2, characterized in that: The model of the processor U2 is TL494.

4. A treadmill low-power drive circuit according to claim 2, characterized in that: A feedback circuit is provided between the motor and the PWM control circuit, the input end of the feedback circuit is connected to the motor, and the output end of the feedback circuit is respectively connected to the fifteenth interface and the sixteenth interface of the processor U2.

5. The low-power driving circuit for a treadmill according to claim 1, characterized in that: The model of the processor U1 is IR2130D.

6. A treadmill low-power drive circuit according to claim 1, characterized in that: The protection circuit includes a MOS tube Q1, a resistor R3, a resistor R4, and a diode D1. The D pole of the MOS tube Q1 is connected to the second interface of the rectifier bridge, the G pole of the MOS tube Q1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the PWM control circuit, the S pole of the MOS tube Q1 is connected to the positive pole of the motor, the input end of the diode D1 is connected to the negative pole of the motor, and the output end of the diode D1 is connected to the positive pole of the motor.

7. A treadmill low-power drive circuit according to claim 6, characterized in that: The protection circuit further includes a switch, and the switch is arranged between the resistor R4 and the positive pole of the motor.

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