CN214672069U

CN214672069U - Electromagnet control circuit

Info

Publication number: CN214672069U
Application number: CN202023019778.7U
Authority: CN
Inventors: 曾文健; 唐杰明; 卢景添
Original assignee: Guangdong Mezic Tech Co ltd
Current assignee: Guangdong Mezic Tech Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-11-09
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses an electromagnet control circuit, including power end, energy-conserving circuit, electro-magnet and switch circuit, wherein, energy-conserving circuit includes first resistance and MOS pipe, the both ends of first resistance respectively with the source electrode and the drain electrode electricity of MOS pipe are connected, the switch circuit electricity is connected the grid of MOS pipe is used for control the MOS pipe is led to or is turn-offed. It is thus clear that implement the utility model discloses can be favorable to reducing the electric energy loss among the electro-magnet control circuit.

Description

Electromagnet control circuit

Technical Field

The utility model relates to an automatically controlled technical field especially relates to an electromagnet control circuit.

Background

An electromagnet is a device that is energized to produce an electromagnet. Specifically, an electrically conductive winding matched to the power of the iron core is wound on the outside of the iron core, and the coil which is energized with the current has magnetism like a magnet, and is called an electromagnet. Electromagnets have many advantages: the magnetism of the electromagnet can be controlled by switching on or off the current; the magnetic strength can be controlled by the strength of current or the number of turns of the coil; the magnetic size can also be controlled by changing the resistance to control the current size; its magnetic poles may be controlled by changing the direction of the current, etc. Therefore, the electromagnet is widely applied in the field of electric control.

For the whole system adopting the electromagnet, especially for the system powered by the storage battery, the electric energy loss of the electromagnet control circuit needs to be as small as possible, so that the cruising ability of the whole system can be more favorably realized.

Therefore, how to reduce the power loss of the electromagnet control circuit is a technical problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that an electromagnet control circuit is provided, can be favorable to reducing the electric energy loss among the electromagnet control circuit.

In order to solve the technical problem, the utility model discloses an electromagnet control circuit, which comprises a power end, an energy-saving circuit, an electromagnet and a switch circuit, wherein,

the energy-saving circuit comprises a first resistor and an MOS tube, wherein two ends of the first resistor are respectively and electrically connected with a source electrode and a drain electrode of the MOS tube,

the switch circuit is electrically connected with the grid electrode of the MOS tube and is used for controlling the MOS tube to be conducted or disconnected.

Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has at least:

the utility model discloses electromagnet control circuit, when the electro-magnet just started, through making the MOS pipe that is connected with the power end electricity switch on, thereby make the power end directly to the electro-magnet power supply, be favorable to avoiding the electric energy loss between power end and the electro-magnet, after needing the electro-magnet to start, through making the MOS pipe of being connected with the power end electricity turn-off, thereby make the power end supply power to the electro-magnet through first resistance, be favorable to avoiding the electric energy at MOS pipe loss, because the electric energy is generally in order to convert into the form loss of heat energy in the MOS pipe, therefore, this can also be favorable to reducing the risk that the MOS pipe damaged.

As an alternative embodiment, in the present invention, the electromagnet control circuit further comprises a microcontroller, and the switching circuit comprises a transistor, wherein,

the microcontroller is electrically connected with the base electrode of the triode and used for controlling the triode to be switched on or switched off.

As an optional implementation manner, in the present invention, the microcontroller is right to the triode outputs the PWM signal.

As an optional implementation manner, in the present invention, the triode is an NPN type triode, and the base of the triode passes through the second resistor and is electrically connected to the microcontroller, the emitter of the triode is grounded, and the collector of the triode passes through the third resistor and is electrically connected to the gate of the MOS transistor.

As an optional implementation manner, in the utility model, the MOS transistor is a PMOS transistor, the energy-saving circuit further includes a fourth resistor, both ends of the fourth resistor respectively with the source and the gate of the MOS transistor are electrically connected.

As an optional implementation manner, in the present invention, the electromagnet is a dc electromagnet, and the power supply end outputs dc power.

Drawings

Fig. 1 is a block diagram of a circuit structure of an electromagnet control circuit according to an embodiment of the present invention;

fig. 2 is a schematic circuit diagram of an electromagnet control circuit according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between different objects and not necessarily for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The electromagnet control circuit in the embodiment of the utility model, as shown in figure 1, comprises a power end, an energy-saving circuit, an electromagnet and a switch circuit, wherein,

as shown in fig. 2, the power saving circuit includes a first resistor R1 and a MOS transistor P1, both ends of the first resistor R1 are electrically connected to the source and the drain of the MOS transistor P1 respectively,

the switch circuit is electrically connected with the grid electrode of the MOS transistor P1 and is used for controlling the MOS transistor P1 to be switched on or switched off,

when the MOS transistor P1 is turned on, the current output from the power source terminal VCC flows to the electromagnet T1 through the MOS transistor P1, so as to realize the power supply from the power source terminal VCC to the electromagnet T1,

when the MOS transistor P1 is turned off, the current output from the power supply terminal VCC flows to the electromagnet T1 through the first resistor R1, so as to supply power to the electromagnet T1 from the power supply terminal VCC.

In the embodiment of the present invention, the switching circuit is used to control the MOS transistor P1 to be turned on or off. At the moment when the electromagnet T1 is just started, the electromagnet T1 control circuit needs to be in full power (i.e., the working condition with the maximum power) operation, at this time, the switching circuit controls the MOS transistor P1 to be turned on, and the current output by the power supply terminal VCC flows to the electromagnet T1 through the MOS transistor P1. After the electromagnet T1 operates (after the electromagnet T1 is powered for the first time), the electromagnet T1 needs to be powered continuously to maintain the starting state of the electromagnet T1, at this time, the switching circuit controls the MOS transistor P1 to be turned off, and the current output by the power supply terminal VCC flows to the electromagnet T1 through the first resistor R1, so that the power supply terminal VCC powers the electromagnet T1.

The embodiment of the utility model provides an in, first resistance R1 can be used for the current-limiting, can confirm first resistance R1's resistance according to the physical parameter (e.g., rated current) of electro-magnet T1 and the physical parameter (e.g., rated power of output or the rated voltage of output) of power end VCC in the practical application scene.

It is visible, the utility model discloses electromagnet control circuit, when the electro-magnet just started, through making the MOS pipe that is connected with the power end electricity switch on, thereby make the power end directly to the electro-magnet power supply, be favorable to avoiding the electric energy loss between power end and the electro-magnet, after needing the electro-magnet to start, through making the MOS pipe of being connected with the power end electricity turn-off, thereby make the power end supply power to the electro-magnet through first resistance, be favorable to avoiding the electric energy at MOS pipe loss, because the electric energy is generally with the form loss that converts into the heat energy in the MOS pipe, therefore, this can also be favorable to reducing the risk that the MOS pipe damaged.

The embodiment of the utility model provides an in, optional, the electro-magnet can be direct current electro-magnet, correspondingly, power end output direct current.

In some embodiments of the present invention, as shown in fig. 1, the electromagnet control circuit further comprises a microcontroller, as shown in fig. 2, the switching circuit comprises a transistor N1, wherein,

the microcontroller (fig. 2 only shows the connection end MCU of the electromagnet control circuit and the microcontroller) is electrically connected to the base of the transistor N1, and is used for controlling the transistor N1 to be turned on or off.

In this embodiment, optionally, the microcontroller may be a control chip model L9110.

In this embodiment, the microcontroller functions to control the transistor to turn on or off. Specifically, the microcontroller may control the state (i.e., on or off) of the transistor by outputting a high/low level to the transistor. Optionally, the microcontroller may output a PWM signal to the transistor. Further optionally, the conduction frequency of the transistor can be controlled by adjusting the PWM signal. The generation and adjustment process for the PWM signal will be obvious to those skilled in the art, and the specific parameters, generation or adjustment process of the PWM signal are not limited by the present invention, and therefore are not described herein again.

In this embodiment, as shown in fig. 2, the transistor N1 is an NPN-type transistor N1, and the base of the transistor N1 is electrically connected to the microcontroller through a second resistor R2, the emitter of the transistor N1 is grounded, and the collector of the transistor N1 is electrically connected to the gate of the MOS transistor P1 through a third resistor R3. Further optionally, as shown in fig. 2, the MOS transistor P1 is a PMOS transistor, the energy-saving circuit further includes a fourth resistor R4, and two ends of the fourth resistor R4 are electrically connected to the source and the gate of the MOS transistor P1, respectively.

In this embodiment, the second resistor R2, the third resistor R3, and the fourth resistor R4 may be used as current limiting resistors. When the microcontroller outputs a high level to the base electrode of the triode N1, the triode N1 is conducted, and at the moment, the MOS transistor P1 is conducted; when the microcontroller outputs a low level to the base of the transistor N1, the transistor N1 turns off, and at this time, the MOS transistor P1 turns off. For the detailed description when the MOS transistor P1 is turned on and when the MOS transistor P1 is turned off, reference may be made to the above description, which is not repeated herein.

Finally, it should be noted that: the electromagnet control circuit disclosed in the embodiment of the present invention is only a preferred embodiment of the present invention, and is only used to illustrate the technical solution of the present invention, not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. An electromagnet control circuit is characterized by comprising a power supply end, an energy-saving circuit, an electromagnet and a switch circuit, wherein,

2. The electromagnet control circuit of claim 1, further comprising a microcontroller, the switching circuit comprising a transistor, wherein,

3. The electromagnet control circuit of claim 2, wherein the microcontroller outputs a PWM signal to the transistor.

4. The electromagnet control circuit according to claim 2, wherein the transistor is an NPN transistor, and a base of the transistor is electrically connected to the microcontroller through a second resistor, an emitter of the transistor is grounded, and a collector of the transistor is electrically connected to the gate of the MOS transistor through a third resistor.

5. The electromagnet control circuit according to claim 4, wherein the MOS transistor is a PMOS transistor, and the energy-saving circuit further comprises a fourth resistor, and both ends of the fourth resistor are electrically connected to the source and the gate of the MOS transistor, respectively.

6. The electromagnet control circuit according to any one of claims 1 to 5, wherein the electromagnet is a direct current electromagnet, and the power supply terminal outputs a direct current.