Direct current brushless motor system

Abstract

The utility model discloses a direct current brushless motor system, which comprises a motor, a driver, a regeneration resistor, a controller, a power supply, a communication cable, an I / O signal cable and external equipment, the power supply is connected with the driver, the controller is connected with the driver through the I / O signal cable, the motor is connected with the driver, the external equipment is connected with the driver through the communication cable, and the regeneration resistor is connected with the controller. A motor system is formed; when the motor generates regeneration energy in the braking or deceleration process, if the regeneration capacity of the system is insufficient, the regeneration resistor is connected with the driver to consume redundant regeneration energy. Through the arrangement of the regeneration resistor, when the motor generates regeneration energy in the braking or deceleration process, if the regeneration capacity of the system is insufficient, that is, the motor system cannot effectively consume redundant electric energy, the regeneration resistor is connected with the driver through a P-B terminal of the discharge interface, and the energy is consumed by converting the redundant electric energy into heat energy; therefore, the system is protected from being damaged by overvoltage, and the stability and service life of the system are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of DC brushless motors, and particularly relates to a DC brushless motor system. Background Art

[0002] The DC brushless motor is a type of synchronous motor. Its working principle is based on electromagnetic induction and field-oriented control principles, and it can convert electrical energy into mechanical energy to achieve rotational motion. Among them, the DC brushless motor is the core component of the DC brushless motor system, and the DC brushless motor system is a complete operating system composed of a DC brushless motor body, a supporting driver, and necessary sensors and other components.

[0003] However, in the existing DC brushless motor system, a regenerative resistor is not provided. When the motor performs braking or deceleration operations, regenerative energy will be generated. If the regenerative capacity designed for the motor system is insufficient to absorb this energy, it may cause the voltage to rise, affecting the system stability and lifespan. Summary of the Utility Model

[0004] To solve the problem that a regenerative resistor is not provided in the existing DC brushless motor system, the utility model provides a DC brushless motor system, and the technical solution is as follows:

[0005] A DC brushless motor system includes a motor, a driver, a regenerative resistor, a controller, a power supply, a communication cable, an I / O signal cable, and an external device. The power supply is connected to the driver, the controller is connected to the driver through the I / O signal cable, the motor is connected to the driver, and the external device is connected to the driver through the communication cable, forming a motor system; when regenerative energy is generated during the braking or deceleration process of the motor, if the system regenerative capacity is insufficient, the regenerative resistor is connected to the driver to consume the excess regenerative energy.

[0006] Preferably, a display area, a key area, a first communication interface, a second communication interface, a control signal interface, a motor power line interface, a discharge interface, and an input power supply interface are sequentially arranged from top to bottom on one side wall of the driver; a status indicator light parallel to the display area in the horizontal direction is also arranged on one side wall of the driver.

[0007] Preferably, the power supply is connected to the L and N terminals of the input power supply interface of the driver, the controller is connected to the control signal interface of the driver through the I / O signal cable, the motor is connected to the W, V, U, and FG terminals of the motor power line interface, and the external device is connected to the first communication interface and the second communication interface of the driver through the communication cable; the regenerative resistor is connected to the driver through the P-B terminals of the discharge interface.

[0008] Preferably, the first communication interface and the second communication interface of the driver are connected to different types of external devices by adopting a communication protocol of RS232 or RS485 protocol.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: by setting a regenerative resistor, when the motor generates regenerative energy during braking or deceleration, if the system regenerative capacity is insufficient, that is, when the motor system cannot effectively consume the excess electric energy, the regenerative resistor is connected to the driver through the P-B terminal of the discharge interface. It consumes this energy by converting the excess electric energy into heat energy, thereby protecting the system from overvoltage damage and improving the system stability and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a working connection schematic diagram of a DC brushless motor system;

[0011] Figure 2 is a three-dimensional structure schematic diagram of a driver in a DC brushless motor system;

[0012] Figure 3 is a three-dimensional structure schematic diagram of a motor in a DC brushless motor system.

[0013] Description of the reference numerals: 1. motor; 2. driver; 201. status indicator light; 202. display area; 203. key area; 204. first communication interface; 205. second communication interface; 206. control signal interface; 207. motor power line interface; 208. discharge interface; 209. input power supply interface; 3. regenerative resistor; 4. controller; 5. power supply; 6. communication cable; 7. I / O signal cable; 8. external device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0015] Please refer to Figures 1 to 3, a brushless DC motor system involved in this embodiment includes a motor 1, a driver 2, a regenerative resistor 3, a controller 4, a power supply 5, a communication cable 6, an I / O signal cable 7, and an external device 8. The power supply 5 is connected to the driver 2, the controller 4 is connected to the driver 2 through the I / O signal cable 7, the motor 1 is connected to the driver 2, and the external device 8 is connected to the driver 2 through the communication cable 6 to form a motor system. When the motor 1 generates regenerative energy during braking or deceleration, if the system regenerative capacity is insufficient, the regenerative resistor 3 is connected to the driver 2 to consume the excess regenerative energy.

[0016] On one side wall of the driver 2, a display area 202, a key area 203, a first communication interface 204, a second communication interface 205, a control signal interface 206, a motor power line interface 207, a discharge interface 208, and an input power interface 209 are arranged in sequence from top to bottom; a status indicator light 201 parallel to the display area 202 in the horizontal direction is also arranged on one side wall of the driver 2.

[0017] The power supply 5 is connected to the L and N terminals of the input power interface 209 of the driver 2, the controller 4 is connected to the control signal interface 206 of the driver 2 through the I / O signal cable 7, the motor 1 is connected to the W, V, U, and FG terminals of the motor power line interface 207, and the external device 8 is connected to the first communication interface 204 and the second communication interface 205 of the driver 2 through the communication cable 6; the regenerative resistor 3 is connected to the driver 2 through the P-B terminal of the discharge interface 208.

[0018] The first communication interface 204 and the second communication interface 205 of the driver 2 are connected to different types of external devices 8 by adopting a communication protocol of RS232 or RS485 protocol.

[0019] In this embodiment, the status indicator light 201 is a group of indicator lights on the driver 2 for displaying its current status, including a power indicator P, a running indicator R, and an alarm indicator A. Among them, the power indicator P is mainly used to display the power status of the driver 2. When the indicator light is on, it means that the power supply has been successfully connected to the driver 2 and the system is in the power-on state; when the power indicator P is off or flashes at a specific frequency, it may indicate that there is a problem with the power supply, such as the power supply is not connected or the voltage is too low. At this time, the power line and the power supply device need to be checked. The running indicator R is used to display the running status of the driver 2. When the indicator light is on or flashes in a specific mode, it means that the driver 2 is working normally; when the running indicator R flashes in an abnormal mode, it means that the driver 2 encounters a fault or the system configuration is incorrect, and further inspection and diagnosis are required. The alarm indicator A is used to prompt that there is a potential fault in the driver 2. When the indicator light flashes in a specific mode, it means that the system needs to be repaired, notifying the operator to take corresponding measures to avoid equipment damage or production interruption caused by system failures.

[0020] The display area 202 includes options represented by data starting with DP, i.e., display parameters, data starting with FN representing selectable auxiliary functions, data starting with ERR representing current alarm information, and data starting with P representing settable parameters, i.e., parameter setting.

[0021] The key area 203 is the key function area of the driver 2, and its key symbols include function selection, confirmation, cyclic shift, and cyclic addition. Among them, function selection is used to select various function options, confirmation is used to confirm input data, cyclic shift is used for data shifting, and cyclic addition is used for adding data.

[0022] The first communication interface 204 includes ports B and A for receiving RS485 B and A signals, internal reference ground GND of the communication port, CAN-H for transmitting high-level signals and CAN-L for transmitting low-level signals, pin RXD for receiving RS232 data and pin TXD for transmitting RS232 data, and internal terminal NC.

[0023] The second communication interface 205 includes ports B and A for receiving RS485 B and A signals, internal reference ground GND of the communication port, CAN-H for transmitting high-level signals and CAN-L for transmitting low-level signals, and the rest are all internal terminals NC.

[0024] In this embodiment, the control signal interface 206 sequentially includes, in the order of terminal numbers:

[0025] CW is set clockwise. When P029 is set to 0: The system interprets the received signal as a motor clockwise start / stop signal. When the corresponding signal is received, the motor will start or stop in the clockwise direction. When P029 is set to 1: The system interprets the received signal as a motor start / stop signal, but the direction is not specified. It means the motor will start or stop, but it will not be specifically specified whether it is clockwise or counterclockwise.

[0026] CCW is set counterclockwise. When P029 is set to 0: The system interprets the received signal as a motor counterclockwise start / stop signal. When the corresponding signal is received, the motor will start or stop in the counterclockwise direction. When P029 is set to 1: The system interprets the received signal as a motor direction selection signal. The signal is used to determine the rotation direction of the motor, rather than directly controlling start or stop.

[0027] BRAKE is the motor electromagnetic brake signal, defaulting to on-brake, and off means no braking.

[0028] M0, M1, and M2 are respectively the multi-speed selection input signals 0, 1, and 2. By presetting different frequency values, they control the motor to run at different fixed speeds.

[0029] ALM-RST is the alarm reset function. When an alarm occurs in the motor system, the alarm can be cleared by sending the ALM-RST signal to restore the system to its normal operating state.

[0030] COM-0V is the input common terminal 0V, which is the internal power supply OV of the driver. It is used to stabilize the input signal to ensure that the control system can receive and process signals from buttons and other control components.

[0031] E5V is the fixed end of the adjustable resistor, which is used to provide a fixed voltage reference point for the motor system.

[0032] SP-A is the speed analog input terminal, which is used to receive the external speed setting signal so that the motor system can read and process it to adjust the running speed of the motor.

[0033] T-A is the torque limit analog input terminal, which is used to receive the torque setting signal from the external device 8. Through the analog signal received by the T-A port, the maximum torque limit of the motor can be set. When the torque exceeds the safe range, the output of the motor will be automatically reduced to prevent the motor from being overloaded or damaged.

[0034] F_OUT is the frequency output port, which is used to output the current running frequency signal of the motor, facilitating the external device 8 to monitor the running frequency of the motor system.

[0035] ALM is the alarm output port, which is used to issue a warning in a timely manner when a device failure or abnormality occurs, so that the operator can quickly take measures to ensure the stable operation of the motor system.

[0036] T_ARV is the torque arrival output port, which is used to indicate that the torque has exceeded the preset threshold. When the torque of the motor reaches the set value, the T_ARV port will be activated and send a signal to the external device 8 to prompt the operator to take measures to reduce the torque of the motor.

[0037] COM-OUT is the output signal common terminal, which provides a reference potential for other output signals, helping to stabilize the output signal, preventing incorrect operations caused by electrical interference or signal drift, and improving the reliability of the motor system.

[0038] The motor power line interface 207 consists of 4 terminal numbers, and its signal names are W, V, U, and FG. The motor 1 is connected to the motor power line W phase, motor power line V phase, motor power line U phase, and motor power line ground wire in one-to-one correspondence.

[0039] All of the above are defaulted to be conductive and effective, and closed is ineffective.

[0040] In this embodiment, the discharge interface 208 consists of 2 terminal numbers, and its signal names are P and B, which are respectively connected to the terminal 1 of the regenerative resistor 3 and the terminal 2 of the regenerative resistor 3. When the regenerative capacity of the motor system is insufficient, that is, when the motor system cannot effectively consume the excess electrical energy, the regenerative resistor 3 is connected across the P - B terminals, and it consumes this energy by converting the excess electrical energy into heat, thereby protecting the system from overvoltage damage.

[0041] The input power supply interface 209 consists of 3 terminal numbers, and its signal names are L, N, and FG, which are respectively connected to the live wire, neutral wire, and ground wire of the input 220VAC power supply. Terminal L is the first terminal of the input power supply interface, which introduces the live wire of the power supply 5 into the system to provide the necessary electrical energy for the motor system. Terminal N is the second terminal of the input power supply interface, which provides a return path for the current and works together with terminal L to form a complete power circuit to ensure that electrical energy can be effectively transmitted into the motor system. Terminal FG is the third terminal of the input power supply interface, which is used to provide ground protection to prevent the risk of electric shock caused by electrical faults.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brushless DC motor system, comprising a motor (1), a driver (2), a regenerative resistor (3), a controller (4), a power supply (5), a communication cable (6), an I / O signal cable (7), and an external device (8), characterized in that: The power supply (5) is connected to the driver (2), the controller (4) is connected to the driver (2) via an I / O signal cable (7), the motor (1) is connected to the driver (2), and the external device (8) is connected to the driver (2) via a communication cable (6), thereby forming a motor system; when the motor (1) generates regenerative energy during braking or deceleration, if the system regenerative capacity is insufficient, the regenerative resistor (3) is connected to the driver (2) to consume the excess regenerative energy.

2. A brushless DC motor system according to claim 1, characterized in that: A side wall of the driver (2) is provided with a display area (202), a key area (203), a first communication interface (204), a second communication interface (205), a control signal interface (206), a motor power line interface (207), a discharge interface (208) and an input power interface (209) in sequence from top to bottom; a status indicator light (201) is also provided on one side wall of the driver (2) and is parallel to the display area (202) in a horizontal direction.

3. A brushless DC motor system according to claim 1, characterized in that: The power supply (5) is connected to the L and N terminals of the input power interface (209) of the driver (2); the controller (4) is connected to the control signal interface (206) of the driver (2) via an I / O signal cable (7); the motor (1) is connected to the W, V, U, and FG terminals of the motor power line interface (207); the external device (8) is connected to the first communication interface (204) and the second communication interface (205) of the driver (2) via a communication cable (6); and the regeneration resistor (3) is connected to the driver (2) via the PB terminal of the discharge interface (208).

4. A brushless DC motor system according to claim 2, characterized in that: The first communication interface (204) and the second communication interface (205) of the driver (2) are connected to different types of external devices (8) by using the communication protocol of RS232 or RS485.

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