CN211457012U

CN211457012U - Inverter switching circuit

Info

Publication number: CN211457012U
Application number: CN201921331872.0U
Authority: CN
Inventors: 陶英
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-09-08
Anticipated expiration: 2029-08-16

Abstract

The utility model discloses an inverter switch circuit, including a plurality of MOS pipe, transformer, load, switch, single-phase BLDC, hall sensor, MOS drive and MCU controller, direct current power supply passes through a plurality of the MOS pipe reaches the switch is connected to single-phase BLDC's both ends, the inside PWM of MCU controller is connected to the MOS drive, the transformer both ends respectively with the switch with the load is connected, the MCU controller with hall sensor connects, the MCU controller is according to external mode selection signal, thereby passes through switch network switches to motor or dc-to-ac converter. The functions of the equipment with different properties are realized through the software programming and the switching network of the MCU, the volume and the cost are saved, and the reliability is improved.

Description

Inverter switching circuit

Technical Field

The utility model relates to a power and brushless DC motor control field especially relate to an inverter switch circuit.

Background

At present, the dc brushless motor is used in many daily applications, such as electric fans and air purifiers, and such applications can be powered by batteries or USB, and the dc brushless motor is powered by a power adapter, such as an on-board system, with 12V or 24V dc. In the applications of vehicle-mounted, solar power generation, energy storage power generation, UPS and the like, direct current needs to be inverted into alternating current such as 220V and 110V for common electric equipment. The two devices are generally operated independently and are integrated.

However, the existing dc brushless motor controller and power inverter have the defect that the control circuit cannot be shared:

the control circuit of the brushless DC motor can not be changed into an AC power supply to be used by other equipment, 2 sets of systems are needed, the use is inconvenient, the occupied volume is large, the reliability is insufficient, and the cost is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the present invention is to provide an inverter switch circuit, which can solve the problem of inconvenient use.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

an inverter switch circuit comprises a plurality of MOS (metal oxide semiconductor) tubes, a transformer, a load, a switch, a single-phase BLDC (binary noise block DC), a Hall sensor, an MOS (metal oxide semiconductor) drive and an MCU (micro controller unit) controller, wherein a direct-current power supply is connected to two ends of the single-phase BLDC through the MOS tubes and the switch, the MCU controller is internally connected to the MOS drive in a PWM (pulse-width modulation) mode, two ends of the transformer are respectively connected with the switch and the load, the MCU controller is connected with the Hall sensor and selects signals according to an external mode so as to switch to a direct-current brushless motor or an inverter through a switch network, and the MCU controller is connected with the switch and controls the switch to be turned on and.

Further, the number of the MOS tubes is 4.

Further, the MCU controller is connected with the switch and controls the switch to be turned on and off.

Further, the switch includes 4 output terminals, two of the 4 output terminals are connected to both ends of the transformer, and the other two output terminals are connected to the single-phase BLDC.

Furthermore, the number of the MOS drives is 4, and the 4 MOS drives are respectively connected with the 4 MOS tubes.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the direct current power supply is connected to two ends of the single-phase BLDC through the MOS tubes and the switches, the internal PWM of the MCU controller is connected to the MOS drive, two ends of the transformer are respectively connected with the switches and the load, the MCU controller is connected with the Hall sensor, and the MCU controller selects signals according to an external mode so as to switch to a motor or an inverter through the switch network. By software programming of the MCU and the switching network, the functions of the equipment with different properties are realized, the volume and the cost are saved, and the reliability is improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a circuit diagram of a preferred embodiment of the inverter switching circuit of the present invention.

In the figure: 10. an MOS tube; 50. a transformer; 60. a load; 70. a switch; 80. a single-phase BLDC; 90. a Hall sensor; 91. MOS driving; 92. and an MCU controller.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, an inverter switch circuit includes a plurality of MOS transistors 10, a transformer 50, a load 60, a switch 70, a single-phase BLDC 80, a hall sensor 90, a MOS driver 91, and an MCU controller 92, wherein a dc power source is connected to two ends of the single-phase BLDC 80 through the plurality of MOS transistors 10 and the switch 70, an internal PWM of the MCU controller 92 is connected to the MOS driver 91, two ends of the transformer 50 are respectively connected to the switch 70 and the load 60, the MCU controller 92 is connected to the hall sensor 90, the MCU controller 92 selects a signal according to an external mode, so as to switch to a dc brushless motor or an inverter through the switch 70, and the MCU controller is connected to the switch and controls on and off of the switch. By software programming of the MCU and the switching network, the functions of the equipment with different properties are realized, the volume and the cost are saved, and the reliability is improved.

It should be noted that there are 2 types of direct current brushless motors (BLDC), one type is a single-phase BLDC (a single phase is described herein), which requires 2 half bridges (4 MOS transistors or IGBTs forming a full bridge, in order to increase power, sometimes the MOS is connected in parallel, that is, one MOS is connected in parallel, 4 MOS becomes 8 MOS), and another type is a three-phase BLDC, which requires 3 half bridges (6 MOS transistors or IGBTs, in order to increase power, sometimes the MOS is connected in parallel, that is, one MOS is connected in parallel, 6 MOS becomes 12 MOS), which is a single phase in this embodiment. Inverter and DC brushless motor can only part independent use generally among the prior art, and general every equipment all need be equipped with one set of drive and MCU, and one set of drive and MCU simultaneous control inverter and DC brushless motor carry out the switching in this application, reduce cost.

Specifically, the number of the MOS transistors 10 is 4. The MCU controller 92 is connected to the switch 70 and controls the on/off of the switch 70. In the circuit, according to an external mode selection signal, the MCU controller 92 is informed of whether it is currently in an inverter power supply mode or a motor control mode, and the MCU controller 92 controls switching to a motor or an inverter through the network of switches 70; the implementation mode of the switch network can be that an MOS tube or an IGBT is provided as a switch, the switch of the relay can be controlled, and potential safety hazards exist in gating through manual jumper wires. And 2 start-stop control signals of the working modes control whether the working state is started or stopped.

Preferably, the switch 70 includes 4 output terminals, two of the 4 output terminals are connected to both ends of the transformer 50, and the other two output terminals are connected to the single-phase BLDC 80. The number of the MOS drivers 91 is 4, and the 4 MOS drivers 91 are respectively connected with the 4 MOS tubes 10. Ingenious design, strong applicability and convenient popularization.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides an inverter switch circuit, includes a plurality of MOS pipe, transformer, load, switch, single-phase BLDC, hall sensor, MOS drive and MCU controller, its characterized in that: the direct current power supply is connected to two ends of the single-phase BLDC through the MOS tubes and the switches, the MCU controller is internally connected to the MOS drive in a PWM mode, two ends of the transformer are respectively connected with the switches and the load, the MCU controller is connected with the Hall sensor and switches to a direct current brushless motor or an inverter through the switch network according to an external mode selection signal, and the MCU controller is connected with the switches and controls the on and off of the switches.

2. The inverter switching circuit according to claim 1, wherein: the number of the MOS tubes is 4.

3. The inverter switching circuit according to claim 1, wherein: the switch comprises 4 output terminals, two of the 4 output terminals are connected with two ends of the transformer, and the other two output terminals are connected with the single-phase BLDC.

4. The inverter switching circuit according to claim 2, wherein: the quantity of MOS drive is 4, 4 the MOS drive respectively with 4 MOS pipe connection.