Driver time division multiplexing control circuit, driver time division multiplexing control system and household appliance

Abstract

The utility model discloses a driver time division multiplexing control circuit, a driver time division multiplexing control system and a household appliance, comprising a controller, a driver, a relay module, a motor switching control module and a load motor module, a signal output end of the controller is respectively connected with a signal input end of the driver and a signal input end of the motor switching control module; the signal output end of the motor switching control module is connected with the signal input end of the relay module, and the signal output end of the driver is connected with the signal input end of the load motor module through the signal output end of the relay module. According to the utility model, the effect of controlling two motors by one driver can be realized, the number of drivers is effectively reduced, and the cost and the installation space are saved.

Description

Technical Field

[0001] The utility model relates to the field of home appliance driver control, in particular to a driver time-sharing multiplexing control circuit. Background Art

[0002] Currently, high-end household appliances have a demand for quietness, so more and more household appliances will use variable frequency drives, such as variable frequency washing motors, variable frequency drainage pumps, variable frequency fans, etc. However, these variable frequency motors require variable frequency drive circuit modules, which have high costs and require corresponding installation space.

[0003] In the case of multiple variable frequency motors on existing electrical products, they are driven by separate drive modules respectively. Several variable frequency motors require a corresponding number of variable frequency drive modules to achieve the drive. The main disadvantages of independently driving multiple variable frequency motors are high motor drive costs and large assembly space requirements. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to propose a control circuit, system and household appliance for time-division multiplexing of a driver, which realizes one driver controlling a variable frequency motor, effectively reduces the number of drivers, saves costs and installation space.

[0005] In a first aspect, the utility model proposes a control circuit for time-division multiplexing of a driver, comprising:

[0006] Controller;

[0007] A driver, controlled by the controller signal, connected to at least two drive signal output terminals for connecting to load motor signals;

[0008] The relay module is controlled by the controller signal, and the connection between the driver and the two drive signal output terminals is switched and controlled by the relay module.

[0009] Optionally, the control circuit also includes a motor switching control module, which is controlled by the controller signal and controls the switching action of the relay.

[0010] Optionally, the motor switching control module includes a resistor R1, a resistor R2 and a transistor.

[0011] One end of the resistor R1 is connected to the controller, and the other end is connected to the base of the transistor;

[0012] One end of the resistor R2 is connected to the base, and the other end is grounded;

[0013] The emitter of the transistor is grounded, and the collector of the transistor is connected to the signal input end of the relay module.

[0014] Optionally, the motor switching control module further includes:

[0015] Resistor R3, one end of the resistor R3 is connected to the controller, and the other end of the resistor R3 is connected to the collector.

[0016] Optionally, the relay module is an electromagnetic relay module, and the motor switching module can be controlled to send a high level or a low level to the relay module to switch and control the connection between the driver and the two drive signal output terminals.

[0017] Optionally, the relay module includes two relays;

[0018] The driver includes a three-phase signal output, wherein one phase signal output is directly connected to the two drive signal output terminals, and each phase signal output of the other two phase signal outputs is connected to the two drive signal output terminals via one of the relays.

[0019] Optionally, the driver is an IPM driver.

[0020] In a second aspect, the utility model proposes a control system for time-division multiplexing of a driver, comprising any one of the above-mentioned control circuits for time-division multiplexing of the driver, the control system further comprising a first load motor and a second load motor;

[0021] The first load motor and the second load motor are respectively connected to the two drive signal output terminals.

[0022] Optionally, at least one of the first load motor and the second load motor is a variable frequency motor.

[0023] In a third aspect, the utility model provides a household appliance, comprising any one of the above-mentioned solutions of the control system for time-sharing multiplexing of the driver.

[0024] The utility model outputs a control signal to a motor switching control module through a controller, and the motor switching control module controls the relay output in the relay module, so that the driver outputs a driving signal to different driving signal output terminals under the control of the relay module. When applied to motors in household appliances, one driver can control two motors, effectively reducing the number of drivers, saving costs and installation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In the attached picture:

[0026] Figure 1 The utility model provides a schematic diagram of a driver time-division multiplexing control circuit. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] First of all, it should be explained that the control circuit for time-division multiplexing of a driver proposed in the present application can be in the form of a conventional circuit board in which various electrical components are integrated.

[0029] Reference Figure 1 The driver time-division multiplexing control circuit of the present application may include a controller MCU (Microcontroller Unit), a driver and a relay module.

[0030] The driver may be an IPM (Intelligent Power Module) driver, which is controlled by a controller MCU signal and is connected to at least two drive signal output terminals for connecting to load motor signals; the drive signal output terminal may be understood as an interface for outputting a drive signal in a circuit, and an external load, such as a motor, may receive a corresponding drive signal by connecting to the output drive signal.

[0031] The relay module in this embodiment is controlled by the controller MCU signal, and the connection between the driver and the two drive signal output terminals is switched and controlled by the relay module; that is, the relay can connect the driver to one of the two drive signal output terminals, or switch to connect to the other of the two drive signal output terminals. For example, the control circuit of the present application contains a drive signal output terminal a and a drive signal output terminal b, and the relay controls the driver to connect to the drive signal output a and disconnect from the drive signal output b; it can also switch the control to connect the driver to the state of disconnecting the drive signal output a and disconnecting the drive signal output b.

[0032] Obviously, based on the above, this embodiment can achieve one driver adapting to two drive signal output ports, without the need to set up multiple drivers to achieve the effect of multiple drive signal output ports, effectively reducing the number of drivers, saving costs and installation space.

[0033] In the present application, the controller MCU can directly control the switching action of the relay, and as an optional embodiment, the above-mentioned control circuit can also include a motor switching control module, which is controlled by the controller MCU signal and controls the switching action of the relay with the signal; that is, the controller MCU indirectly controls the switching action of the relay through the motor switching module.

[0034] In this embodiment, refer to Figure 1 , the motor switching control module may include a resistor R1, a resistor R2 and a transistor Q. Among them, one end of the resistor R1 is connected to the controller MCU, and the other end is connected to the base of the transistor Q; one end of the resistor R2 is connected to the base of the transistor Q, and the other end is grounded. As shown in the figure, the resistor R1, the resistor R2 and the base of the transistor Q have a common connection point A as shown in the figure. In addition, in this embodiment, the emitter of the transistor Q is grounded, and the collector of the transistor Q is connected to the signal input end of the relay module.

[0035] In this embodiment, in order to enable the controller MCU to accurately obtain the real state of the relay module, the motor switching control module may further include:

[0036] Resistor R3, one end of which is connected to the controller MCU, and the other end is connected to the collector of transistor Q. Thus, a feedback circuit is formed to feed back the switching control signal of the motor switching control module to the controller MCU, ensuring that the controller MCU can accurately obtain the current state of the relay module.

[0037] The type of relay in the relay module of the embodiment of the present application is not limited, and it can be an electromagnetic relay module composed of electromagnetic relays; and the control method of the motor switching module can be that the motor switching module can be controlled to send a high level or a low level to the relay module to switch the connection between the control driver and the two drive signal output terminals.

[0038] In an embodiment of the present application, the relay module includes two relays;

[0039] The above driver includes three-phase signal output, one of which is directly connected to two drive signal output terminals, and each of the other two phases is connected to two drive signal output terminals via a relay. It should be noted that each phase signal output in the driver can be understood as the output signal pin of the driver as an electrical element, which sends a single-phase control signal to the outside.

[0040] Here, you can refer to Figure 1The relay module includes two relays Relay1 and Relay2, and the driver includes three-phase signal outputs of U, V, and W, among which the W-phase signal output is directly connected to the drive signal output end, and the U-phase and W-phase signal outputs are connected to relays Relay1 and Relay2 respectively. At the same time, the U-phase and W-phase of the two drive signal output ends are connected to the two relays Relay1 and Relay2 respectively.

[0041] As another embodiment of the present application, this embodiment proposes a control system for time-sharing multiplexing of a driver, comprising the control circuit described in any of the above embodiments, and the control system also includes a first load motor and a second load motor; the first load motor and the second load motor are respectively connected to the two drive signal output terminals mentioned above.

[0042] In an optional embodiment, at least one of the first load motor and the second load motor is a variable frequency motor.

[0043] In this embodiment, the controller outputs a control signal to the motor switching control module, and the motor switching control module controls the relay output in the relay module, so that the driver outputs the driving signal to different driving signal output terminals under the control of the relay module. When applied to motors in household appliances, one driver can control two motors, effectively reducing the number of drivers, saving costs and installation space.

[0044] In order to more clearly illustrate the scheme and effect of this implementation, examples are given in conjunction with the accompanying drawings:

[0045] like Figure 1 The controller MCU is the main control chip, the driver is the IPM driver; the relay is a single-pole double-throw relay, and one of the relays is normally closed. The control system includes variable frequency load motor 1 and load motor 2; the relay module includes relay Relay1 and relay Relay2.

[0046] The controller MCU communicates with the IPM driver and controls the IPM driver output; when the load motor 1 needs to work, the controller MCU controls the motor switching control module signal to be low level, and the relay module does not work. At this time, the contacts 3 and 4 of the relay Relay1 and the relay Relay2 are turned on, and the V phase and U phase of the IPM driver are turned on with the load motor 1 at the same time. At this time, the U, V, and W of the load motor 1 are connected to the IPM driver at the same time. The controller MCU communicates with the IPM driver and controls the IPM driver to output the control algorithm of the load motor 1. At this time, the load motor 1 starts to work, and the load motor 2 does not work. And the motor switching feedback signal is high level, and the controller MCU can detect the corresponding working state of the relay module.

[0047] When the controller MCU needs to make the load motor 2 work, the controller MCU first stops the IPM driver output, and then outputs the motor switching control module signal to a high level. At this time, the two relays Relay1 and Relay2 work at the same time, and the contacts 3 and 5 of the relays Relay1 and Relay2 are turned on. The V-phase and U-phase outputs of the IPM driver are switched to be connected to the load motor 2 at the same time. At this time, the U, V, and W of the load motor 2 are connected to the IPM driver at the same time. The controller MCU communicates with the IPM driver and controls the IPM driver to normally output the control algorithm of the load motor 2. At this time, the load motor 2 starts to work and the load motor 1 stops working. At the same time, the motor switching feedback signal is a low level, and the controller MCU can detect the corresponding working status of the relay module.

[0048] In a third aspect, the utility model provides a household appliance, which comprises any one of the implementation schemes of the control system for time-division multiplexing of the above-mentioned driver.

[0049] Specifically, the household appliance may be a dishwasher, a refrigerator, a washing machine or a range hood.

[0050] In this embodiment, the controller outputs a control signal to the motor switching control module, and the motor switching control module controls the relay output in the relay module, so that the driver outputs the driving signal to different driving signal output terminals under the control of the relay module. When applied to motors in household appliances, one driver can control two motors, effectively reducing the number of drivers, saving costs and installation space.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control circuit for time-division multiplexing of a driver, characterized in that: include: Controller; A driver, controlled by the controller signal, connected to at least two drive signal output terminals for connecting to load motor signals; The relay module is controlled by the controller signal, and the connection between the driver and the two drive signal output terminals is switched and controlled by the relay module.

2. A driver time-division multiplexing control circuit according to claim 1, characterized in that: It also includes a motor switching control module, which is controlled by the controller signal and controls the switching action of the relay.

3. A driver time-division multiplexing control circuit according to claim 2, characterized in that: The motor switching control module includes a resistor R1, a resistor R2 and a transistor. One end of the resistor R1 is connected to the controller, and the other end is connected to the base of the transistor; One end of the resistor R2 is connected to the base, and the other end is grounded; The emitter of the transistor is grounded, and the collector of the transistor is connected to the signal input end of the relay module.

4. A driver time-division multiplexing control circuit according to claim 3, characterized in that: The motor switching control module also includes: Resistor R3, one end of the resistor R3 is connected to the controller, and the other end of the resistor R3 is connected to the collector.

5. A driver time-division multiplexing control circuit according to claim 3, characterized in that: The relay module is an electromagnetic relay module, and the motor switching module can be controlled to send a high level or a low level to the relay module to switch and control the connection between the driver and the two drive signal output terminals.

6. A driver time-division multiplexing control circuit according to claim 1, characterized in that: The relay module includes two relays; The driver includes a three-phase signal output, wherein one phase signal output is directly connected to the two drive signal output terminals, and each phase signal output of the other two phase signal outputs is connected to the two drive signal output terminals via one of the relays.

7. A driver time-division multiplexing control circuit according to claim 1, characterized in that: The driver is an IPM driver.

8. A control system for time-division multiplexing of a driver, characterized in that: A control circuit for time-division multiplexing of a driver comprising any one of claims 1 to 7, wherein the control system further comprises a first load motor and a second load motor; The first load motor and the second load motor are respectively connected to the two drive signal output terminals.

9. A driver time-division multiplexing control system according to claim 8, characterized in that: At least one of the first load motor and the second load motor is a variable frequency motor.

10. A household appliance, characterized in that: A control system comprising time-division multiplexing of the drivers as claimed in any one of claims 8 and 9.

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