Motor controller suitable for various DC power supply inputs and DM motor

Abstract

The utility model discloses a motor controller and a DM motor suitable for various DC power supply inputs, the motor controller comprises a control circuit and a power circuit, the control circuit is used for controlling the power circuit to work, the control circuit comprises a control logic circuit and a mode setting circuit, the power circuit comprises an inverter circuit and a BOOST circuit, and the inverter circuit is connected with the mode setting circuit. The DC power supply can provide a DC bus voltage Vbus for the inverter circuit only after being boosted by the BOOST circuit; the mode setting circuit is used for setting the type of an input DC power supply and sending a signal instruction to the control logic circuit; and the control logic circuit controls the BOOST circuit and the inverter circuit to work according to the input type of the DC power supply. The multi-power-supply adaptability of the motor controller can meet the requirements of different types of power supply input in different application occasions, and a photovoltaic panel, a storage battery, a rectification power supply or a combination thereof can be used for the motor controller, so that the adaptability of the motor controller is improved.

Description

Technical field:

[0001] The utility model relates to a motor controller suitable for various DC power inputs and a DM motor. The DM motor means a digitally controlled motor, including a brushless DC motor, a permanent magnet synchronous motor and other motors with a microprocessor and an inverter circuit. Background technology:

[0002] At present, the high-power fan motors on the market (power is about 1 / 2HP and 1HP), their structural layout is generally divided into: motor and motor controller, see patent number: 201821508373.X, named: a utility model patent for a multi-gear BLDC motor, most of these types of motors are iron-shell motors, including motors and motor controllers, the motors include a housing, a stator assembly and a rotor assembly, the motor controller includes a control box and a control circuit board installed in the control box, the control circuit board is integrated with a microprocessor (a single-chip microcomputer or a digital signal processor DSP), an inverter circuit and a power supply part. The above-mentioned power supply part is directly connected to the mains, and the AC power of the mains is converted into DC power for use by various circuits.

[0003] The motor of this structure has the following disadvantages: 1) The input power type is fixed and can only be connected to the mains, so the application range is narrow. For example, in the suburbs, when there is no AC mains, and only DC power from batteries or solar panels, this motor cannot be used; 2) The power devices of the inverter circuit in the motor controller are all extended out of the circuit board and soldered to the printed circuit on the surface of the circuit board, which increases the size of the motor controller, reduces the power density, and causes large EMI of the system. Summary of the invention:

[0004] The purpose of the utility model is to provide a motor controller and a DM motor suitable for a variety of DC power inputs, so as to solve the technical problem that in the prior art, the motor controllers of high-power motors are generally directly connected to the AC power of the mains, the input power type is fixed, can only be connected to the mains, and have a narrow scope of application.

[0005] The purpose of the utility model is achieved through the following technical solutions.

[0006] A motor controller suitable for multiple DC power inputs comprises a control box and a control circuit board installed in the control box, the control circuit board integrates two parts, a control circuit and a power circuit, the control circuit is used to control the operation of the power circuit, the control circuit comprises a control logic circuit and a mode setting circuit, the power circuit comprises an inverter circuit and a BOOST circuit, wherein: the DC power supply can provide a DC bus voltage Vbus for the inverter circuit only after being boosted by the BOOST circuit; the control logic circuit controls the operation of the BOOST circuit and the inverter circuit according to the input type of the DC power supply; the mode setting circuit comprises a display and a setting button, the display and the setting button are arranged on the surface of the control box, the setting button is used to set the type of the input DC power supply and send a signal instruction to the control logic circuit; the display is used to display the selected DC power supply type.

[0007] The DC power source is a battery, or a solar photovoltaic panel, or a rectifier power source, or a combination of a battery and a solar photovoltaic panel.

[0008] A plurality of terminals are arranged at the bottom end of the control box, and the plurality of terminals include a DC power supply terminal, a stator winding connection terminal and a sensor terminal.

[0009] The above-mentioned control logic circuit includes a microprocessor MCU, a motor operation parameter detection circuit and a bus voltage detection circuit. The motor operation parameter detection circuit sends the real-time data of the motor operation to the microprocessor MCU, and the microprocessor MCU controls the operation of the inverter circuit; the bus voltage detection circuit transmits the signal to the microprocessor MCU, and the microprocessor MCU controls the operation of the BOOST circuit.

[0010] The above control logic circuit also includes a DC power supply input current detection circuit, and the DC power supply input current detection circuit sends data to the microprocessor MCU for processing.

[0011] The microprocessor MCU is also connected to a wireless communication module. The microprocessor MCU uses the wireless communication module to connect and communicate with the outside world. The wireless communication module is a Bluetooth module or a WIFI module.

[0012] An antenna for wireless communication is arranged on the top of the control box, and the antenna is electrically connected to the control circuit board.

[0013] The above-mentioned control logic circuit also includes a DC-DC step-down isolation circuit, the input end of the DC-DC step-down isolation circuit is connected to the output end of the DC power supply, and the output end of the DC-DC step-down isolation circuit provides low-voltage direct current.

[0014] Mounting ears are arranged on both sides of the control box.

[0015] A DM motor includes a motor and a motor controller. The motor includes a stator assembly and a permanent magnet rotor assembly. The stator assembly and the permanent magnet rotor assembly are magnetically coupled. The motor controller controls the operation of the motor. The motor controller is characterized in that the motor controller is the motor controller suitable for multiple DC power inputs as described above.

[0016] Compared with the prior art, the utility model has the following effects:

[0017] 1) Multi-power adaptability can solve the needs of different types of power input in different applications. Whether it is photovoltaic panels, batteries, rectifier power supplies or their combination, they can be used for the motor controller, thereby improving the adaptability of the motor controller and making the power supply configuration flexible and convenient.

[0018] 2) Other advantages of the present invention are described in detail in the embodiment section. Description of the drawings:

[0019] Figure 1 It is a three-dimensional diagram of the motor controller of the first embodiment of the utility model;

[0020] Figure 2 This is a three-dimensional diagram of the motor controller of the first embodiment of the utility model with the front shell omitted;

[0021] Figure 3 This is a circuit diagram of the first embodiment of the utility model;

[0022] Figure 4 yes Figure 3 Specific circuit block diagram;

[0023] Figure 5 This is a schematic diagram of the first embodiment of the utility model in which a DC power supply input current detection circuit is added;

[0024] Figure 6 This is an implementation structure diagram of the second embodiment of the present utility model. Specific implementation method:

[0025] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0026] Embodiment one:

[0027] like Figures 1 to 5As shown, the present embodiment provides a motor controller suitable for a variety of DC power inputs, including a control box 21 and a control circuit board 22 installed in the control box 21, the control circuit board 22 integrates a control circuit and a power circuit, the control circuit is used to control the operation of the power circuit, and is characterized in that: the control circuit includes a control logic circuit and a mode setting circuit, the power circuit includes an inverter circuit and a BOOST circuit, wherein: the DC power supply can provide a DC bus voltage Vbus to the inverter circuit only after being boosted by the BOOST circuit; the control logic circuit controls the operation of the BOOST circuit and the inverter circuit according to the input type of the DC power supply; the mode setting circuit includes a display 24 and a setting button 25, the display 24 and the setting button 25 are arranged on the surface of the control box 21, the setting button 25 is used to set the type of the input DC power supply and send a signal instruction to the control logic circuit; the display 24 is used to display the selected DC power supply type. Figure 3 The inverter circuit in is a three-phase bridge circuit.

[0028] The above-mentioned various DC power sources include batteries, solar photovoltaic panels, rectifier power supplies and a combination of batteries and solar photovoltaic panels, wherein the batteries and solar photovoltaic panels must be boosted by a BOOST circuit before they can provide a DC bus voltage Vbus for the inverter circuit.

[0029] The multi-power adaptability of the utility model can solve the needs of different types of power inputs in different application occasions. No matter photovoltaic panels, batteries, rectifier power supplies or their combinations, they can be used for the motor controller, thereby improving the adaptability of the motor controller and making the power supply configuration operation flexible and convenient.

[0030] The above-mentioned control logic circuit includes a microprocessor MCU, a motor operation parameter detection circuit and a bus voltage detection circuit. The motor operation parameter detection circuit sends the real-time data of the motor operation to the microprocessor MCU, and the microprocessor MCU controls the operation of the inverter circuit; the bus voltage detection circuit transmits the signal to the microprocessor MCU, and the microprocessor MCU controls the operation of the BOOST circuit. The motor operation parameter detection circuit can be a phase current detection circuit or a rotor position detection circuit. The phase current detection circuit is used to detect the phase current data; the rotor position detection circuit is used to detect the rotor position signal.

[0031] The above-mentioned control logic circuit also includes a DC power supply input current detection circuit, which sends data to the microprocessor MCU for processing. The microprocessor MCU controls the BOOST circuit according to the type of input DC power supply, input voltage, input current and bus voltage data, so as to obtain a stable DC bus voltage Vbus that meets the working requirements of the inverter circuit.

[0032] The above-mentioned mode setting circuit is a display and key circuit, which uses the display and key circuit to input signals to the microprocessor MCU to set the type of input DC power supply. The display and key circuit includes a small LCD display and several keys. The LCD display is used to display the data sent by the microprocessor MCU, and the several keys are used to input data and instructions to the microprocessor MCU.

[0033] The above-mentioned microprocessor MCU is also connected to a wireless communication module. The microprocessor MCU uses the wireless communication module to connect and communicate with the outside world. The wireless communication module is a Bluetooth module or a WIFI module.

[0034] The above-mentioned control logic circuit also includes a DC-DC step-down isolation circuit. The input end of the DC-DC step-down isolation circuit is connected to the output end of the DC power supply. The output end of the DC-DC step-down isolation circuit provides low-voltage direct current to power various circuits. For example, the DC-DC step-down isolation circuit outputs +5V and +15V DC voltages. +5V is used to power the microprocessor, display and button circuits, and DC power supply input current detection circuit, and +15V is used to provide voltage for the drive of the inverter circuit.

[0035] The upper surface of the control box 21 is provided with a liquid crystal display 24 and a plurality of buttons 25, mounting ears 26 are provided on both sides of the control box 21, an antenna 27 for wireless communication is provided at the top of the control box 21, the antenna 27 is electrically connected to the control circuit board 22, a plurality of wiring terminals 23 are provided at the bottom of the control box 21, the plurality of wiring terminals 23 are electrically connected to the control circuit board 22, and the plurality of wiring terminals 23 include a DC power supply wiring terminal connected to an input DC power supply, a stator winding connection terminal and a sensor wiring terminal. It has a simple structure and convenient wiring.

[0036] Embodiment 2:

[0037] like Figure 6 As shown, a DM motor includes a motor 100 and a motor controller 200, wherein the motor includes a stator assembly and a permanent magnet rotor assembly, the stator assembly and the permanent magnet rotor assembly are magnetically coupled, and the motor controller 200 controls the operation of the motor 100, characterized in that: the motor controller 200 is the motor controller suitable for multiple DC power inputs as described in Example 1.

[0038] Figure 3This is the circuit block diagram of the embedded motor controller. It can be seen from the figure that it includes two parts, namely the power circuit and the main circuit. The power circuit is used to realize power conversion, and the control circuit is used to control the power circuit. The power circuit includes two parts, the Boost circuit and the inverter circuit (i.e., the three-phase bridge circuit). The control circuit also includes two parts, the control logic circuit and the mode setting circuit. The mode setting circuit is used to set the mode according to the different types of input DC power supply, and then transmit it to the control logic circuit through a communication signal. The control logic circuit performs different controls for different mode settings according to the control signal. Specifically, the mode setting includes four types, corresponding to four different input power supplies, namely photovoltaic panels, batteries, rectifier power supplies, and photovoltaic panels + batteries. When the input mode corresponds to the photovoltaic panel input, the photovoltaic panel is connected through the two terminals of input 2 and input 3, and the Boost circuit performs limited maximum power control, that is, when the light is sufficient and the maximum output power of the photovoltaic panel is greater than the required power of the motor, the Boost circuit limits the output power of the photovoltaic panel to make it equal to the required power of the motor; when the light is insufficient and the maximum output power of the photovoltaic panel is less than or equal to the required power of the motor, Boost controls the photovoltaic panel to operate at the maximum power point, and the three-phase bridge circuit limits the motor operating power to be equal to the output power of the photovoltaic panel;

[0039] When the input mode corresponds to battery input, the battery is connected through the two terminals of input 2 and input 3, and the Boost circuit performs traditional boost control to ensure that the input voltage of the three-phase bridge circuit is constant and higher than the battery voltage, thereby ensuring the efficient operation of the three-phase inverter;

[0040] When the input power corresponds to the rectifier power input, the rectifier power is connected through the two terminals of input 2 and input 3, and the Boost circuit performs power factor correction control to ensure that the rectifier power operates in a high power factor and low harmonic state, thereby eliminating the pollution of the traditional motor controller to the power grid.

[0041] When the input mode corresponds to photovoltaic panel + battery input, the photovoltaic panel is input through the two terminals of input 2 and input 3, and the battery is input through the two terminals of input 1 and input 3. The Boost circuit performs maximum power tracking control. When the sunlight is sufficient and the maximum output power of the photovoltaic panel is greater than the power required for the motor to operate, the excess electric energy is used to charge the battery. When the sunlight is insufficient and the maximum output power of the photovoltaic panel is less than the power required for the motor to operate, the battery discharges to make up for the insufficient output of the photovoltaic panel, thereby ensuring that the motor can reliably operate in the working state required by the load.

[0042] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A motor controller suitable for multiple DC power inputs, comprising a control box (21) and a control circuit board (22) installed in the control box (21), wherein the control circuit board (22) integrates a control circuit and a power circuit, wherein the control circuit is used to control the operation of the power circuit, and wherein: The control circuit comprises a control logic circuit and a mode setting circuit, and the power circuit comprises an inverter circuit and a BOOST circuit, wherein: the DC power supply can provide a DC bus voltage Vbus for the inverter circuit only after being boosted by the BOOST circuit; the control logic circuit controls the operation of the BOOST circuit and the inverter circuit according to the input type of the DC power supply; the mode setting circuit comprises a display (24) and a setting button (25), the display (24) and the setting button (25) are arranged on the surface of the control box (21), the setting button (25) is used to set the type of the input DC power supply and send a signal instruction to the control logic circuit; the display (24) is used to display the selected DC power supply type.

2. The motor controller suitable for multiple DC power inputs according to claim 1, characterized in that: The DC power source is a battery, or a solar photovoltaic panel, or a rectifier power source, or a combination of a battery and a solar photovoltaic panel.

3. The motor controller suitable for multiple DC power inputs according to claim 1, characterized in that: A plurality of terminals (23) are arranged at the bottom end of the control box (21), and the plurality of terminals (23) include a DC power supply terminal, a stator winding connection terminal and a sensor terminal.

4. A motor controller suitable for multiple DC power inputs according to claim 1, 2 or 3, characterized in that: The control logic circuit includes a microprocessor MCU, a motor operation parameter detection circuit and a bus voltage detection circuit. The motor operation parameter detection circuit sends the real-time data of the motor operation to the microprocessor MCU, and the microprocessor MCU controls the operation of the inverter circuit; the bus voltage detection circuit transmits the signal to the microprocessor MCU, and the microprocessor MCU controls the operation of the BOOST circuit.

5. The motor controller suitable for multiple DC power inputs according to claim 4, characterized in that: The control logic circuit also includes a DC power supply input current detection circuit, which sends data to the microprocessor MCU for processing.

6. The motor controller suitable for multiple DC power inputs according to claim 5, characterized in that: The microprocessor MCU is also connected to a wireless communication module. The microprocessor MCU uses the wireless communication module to connect and communicate with the outside world. The wireless communication module is a Bluetooth module or a WIFI module.

7. The motor controller suitable for multiple DC power inputs according to claim 6, characterized in that: An antenna (27) for wireless communication is arranged at the top of the control box (21), and the antenna (27) is electrically connected to the control circuit board (22).

8. The motor controller suitable for multiple DC power inputs according to claim 7, characterized in that: The control logic circuit also includes a DC-DC step-down isolation circuit, the input end of the DC-DC step-down isolation circuit is connected to the output end of the DC power supply, and the output end of the DC-DC step-down isolation circuit provides low-voltage direct current.

9. The motor controller suitable for multiple DC power inputs according to claim 8, characterized in that: Mounting ears (26) are arranged on both sides of the control box (21).

10. A DM motor, comprising a motor (100) and a motor controller (200), wherein the motor comprises a stator assembly and a permanent magnet rotor assembly, the stator assembly and the permanent magnet rotor assembly are magnetically coupled, and the motor controller (200) controls the motor (100) to operate, characterized in that: The motor controller (200) is a motor controller suitable for multiple DC power inputs as described in any one of claims 1 to 9.

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