CN116526899A - Driving circuit and driving device - Google Patents

Abstract

The application discloses drive circuit and drive arrangement, this drive circuit includes: the first switch is connected with a first power input end at a first passage end, is connected with external equipment at a second passage end, and is used for receiving a first driving signal to control the on or off of the first switch at a control end; the first passage end of the second switch is connected with the external equipment, the second passage end of the second switch is connected with the ground, and the control end of the second switch is used for receiving a second driving signal to control the on or off of the second switch; wherein the first switch is a silicon controlled switch. Through the circuit, the circuit has the characteristics of simple structure, low cost and the like.

Description

Driving circuit and driving device

Technical Field

The present disclosure relates to the field of circuit design, and in particular, to a driving circuit and a driving device.

Background

In the dc motor control circuit, an H-bridge driving circuit is generally used to control the dc motor. The circuit is named "H-bridge drive circuit" because it is shaped like the letter H, a simple H-bridge drive circuit consists of 4 legs of 4 transistors, with the motor on the bar in H. The H-bridge driving circuit is composed of two H-driving circuits, wherein each driving circuit comprises an upper bridge switching device and a lower bridge switching device.

If the H bridge type driving circuit is to drive the motor to rotate, a pair of switching triodes on the diagonal line must be conducted, the other pair of triodes should be turned off at the moment, and the current flow direction is different according to the conduction condition of different triodes, if the direct current motor is a permanent magnet direct current motor, a separately excited direct current motor or a compound excited direct current motor, the steering of the motor is changed along with the change of the circuit direction.

As application scenarios continue to be complicated, the design of the H-bridge driving circuit is also becoming more diversified. In the design of the upper bridge switching device and the lower bridge switching device, the traditional switching device is used and needs to be matched with an amplifying circuit with complex configuration, but under the condition, the circuit cost is easy to increase, meanwhile, the circuit difficulty is increased, and the circuit is not manufactured and used by manufacturers.

Disclosure of Invention

The technical problem that this application mainly solves is to provide a drive circuit and drive arrangement, can simplify drive circuit structure and reduce circuit cost simultaneously.

In order to solve the technical problems, the application adopts a technical scheme that: there is provided a driving circuit including: the first switch is connected with a first power input end at a first passage end, is connected with external equipment at a second passage end, and is used for receiving a first driving signal to control the on or off of the first switch at a control end; the first passage end of the second switch is connected with the external equipment, the second passage end of the second switch is connected with the ground, and the control end of the second switch is used for receiving a second driving signal to control the on or off of the second switch; wherein the first switch is a silicon controlled switch.

Optionally, the driving circuit further includes: the input end of the first control module is connected with the second power input end, the output end of the first control module is connected with the control end of the first switch so as to output a first driving signal, and the control end of the first control module is used for receiving the first control signal; the input end of the second control module is connected with the second power input end, the output end of the second control module is connected with the control end of the second switch so as to output a second driving signal, and the control end of the second control module is used for receiving the second control signal.

Optionally, the first control module includes a third switch, a first path end of which is connected to the second power input end, and a second path end of which is connected to the control end of the first switch; and the first passage end of the fourth switch is connected with the control end of the third switch, the second passage end of the fourth switch is connected with the ground end, and the control end of the fourth switch receives the first control signal.

Optionally, the third switch is an NPN transistor, and the fourth switch is a PNP transistor.

Optionally, the second control module includes a fifth switch, a first path end of which is connected to the second power input end, and a second path end of which is connected to the control end of the second switch; and the first passage end of the sixth switch is connected with the control end of the fifth switch, the second passage end of the sixth switch is connected with the ground end, and the control end of the sixth switch receives the second control signal.

Optionally, the fifth switch is an NPN triode, and the sixth switch is a PNP triode.

Optionally, the second switch is a MOS transistor.

In order to solve the above problems, another technical scheme adopted in the application is as follows: the driving device comprises at least one driving circuit, wherein the output end of each driving circuit is connected with external equipment; the driving circuit is a driving circuit corresponding to the driving circuit; and the controller is connected with the driving circuit and used for controlling the driving circuit to drive the external equipment.

Optionally, the driving device at least comprises a first driving circuit and a second driving circuit; the controller is used for outputting a first control signal and a second control signal to the first driving circuit; the first control signal is a first level signal for controlling a first switch in the first driving circuit to be turned on, and the second control signal is a second level signal for controlling a second switch in the first driving circuit to be turned off; outputting a third control signal and a fourth control signal to the second driving circuit; the third control signal is a second level signal for controlling the first switch in the second driving circuit to be closed, and the fourth control signal is a first level signal for controlling the second switch in the second driving circuit to be opened; wherein the first level signal and the second level signal are opposite in level.

Optionally, the controller is further configured to adjust the first control signal to be a second level signal to control the first switch in the first driving circuit to be turned off, and adjust the second control signal to be the first level signal to control the second switch in the first driving circuit to be turned on; the third control signal is adjusted to be a first level signal to control the first switch in the second driving circuit to be opened, and the fourth control signal is adjusted to be a second level signal to control the second switch in the second driving circuit to be closed.

The beneficial effects of this application are: unlike the prior art, the present application provides a driving circuit comprising: the first switch, its first access end connects the first power input end, its second access end connects the output end, its control end controls the opening or closing of the first switch according to the first driving signal; the first passage end of the second switch is connected with the output end, the second passage end of the second switch is connected with the ground end, and the control end of the second switch controls the second switch to be turned on or off according to a second driving signal; the first switch is a silicon controlled switch. By using the driving circuit, the structure of the driving circuit can be simplified, and the manufacturing cost of the driving circuit can be reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic structural diagram of a first embodiment of a driving circuit provided in the present application;

FIG. 2 is a schematic diagram of a driving circuit according to a second embodiment of the present application;

FIG. 3 is a schematic diagram of a third embodiment of a driving circuit provided in the present application;

fig. 4 is a schematic structural view of a first embodiment of a driving device provided in the present application;

FIG. 5 is a schematic view of a second embodiment of a driving device provided in the present application;

FIG. 6 is a schematic view of a third embodiment of a driving device according to the present application;

FIG. 7 is a schematic diagram of an embodiment of a driving flow of a driving device provided in the present application;

fig. 8 is a schematic structural view of a fourth embodiment of a driving device provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting. It should be further noted that, for convenience of description, only some, but not all, of the methods and processes related to the present application are shown in the accompanying drawings. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases 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. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The direct current motor can be divided into a brush direct current motor and a brushless direct current motor, wherein the brush direct current motor generates maximum torque due to the fact that a magnetic field generated by permanent magnet steel and a magnetic field generated after a point winding is electrified are always vertical in the running process of the motor, and the motor is enabled to run. The brushless DC motor operates in the same principle as a brush motor, i.e., under a magnetic pole having a constant flux density distribution, it is ensured that the total amount of current flowing in the armature winding is constant to generate a constant torque, and the torque is only related to the magnitude of the armature current.

The brushless DC motor also needs to rely on a rotor position sensor to detect a position signal of a rotor, and the commutation drive circuit drives the on and off of each power switch tube connected with the armature winding, so that the electrification of the stator winding is controlled, a rotating magnetic field is generated on the stator, and the rotor is dragged to rotate. As the rotor rotates, the position sensor constantly sends out a signal to change the energized state of the armature so that the direction of current in the conductors under the same pole is unchanged. Thus, a constant torque is generated to operate the brushless DC motor.

In the driving circuits of the two direct current motors, an H-bridge driving circuit is generally used for driving and controlling the motors, and the traditional H-bridge driving circuit has complex switch circuit design and high manufacturing cost. According to the above-mentioned problems, the present application provides a driving circuit, which can effectively improve the above-mentioned problems.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a driving circuit provided in the present application.

The driving circuit 100 includes a first switch 10 and a second switch 20, wherein the first switch 10 is a thyristor switch.

The driving circuit 100 is a part of an H-bridge driving circuit, and generally comprises an upper bridge amplifying circuit, an upper bridge switching device, a lower bridge amplifying circuit, and a lower bridge switching device.

VDD in fig. 1 denotes a first power supply, VSS denotes ground, up_en denotes a first driving signal, dw_en denotes a second driving signal, and i_output denotes an OUTPUT signal. A first path end of the first switch 10 in the driving circuit 100 is connected with a first power input end, a second path end is connected with an output end and outputs an electric signal, and a control end controls the first switch 10 to be turned on or turned off according to a first driving signal UP_EN; the first path end of the second switch 20 is connected with the output end, the second path end is connected with the ground end, and the control end controls the second switch 20 to be turned on or turned off according to the second driving signal DW_EN; wherein the first switch 10 is a thyristor switch.

The thyristor switch is also called thyristor switch device, is a short term for thyristor, is a high-power switch type semiconductor device, and is indicated by symbols V and VT in a circuit. Generally, the silicon controlled rectifier can be divided into a plurality of common silicon controlled rectifier, bidirectional silicon controlled rectifier, reverse conduction silicon controlled rectifier, gate turn-off silicon controlled rectifier, BTG silicon controlled rectifier, temperature controlled silicon controlled rectifier, light controlled silicon controlled rectifier and the like according to the turn-off, turn-on and control modes. The silicon controlled rectifier is short for a silicon controlled rectifier element, and is a high-power semiconductor device with a four-layer structure and three PN junctions.

In the driving circuit 100 of the present application, when the first path end is connected to the first power source, the first driving signal drive_1 is input from the control end, and controls the first switch 10 to be turned on or off according to whether the first driving signal drive_1 reaches a certain output power, and when the first driving signal drive_1 is greater than a certain power threshold, the first switch is controlled to be turned on; when the first DRIVE signal drive_1 is smaller than a certain power threshold, the first switch is controlled to be closed. Similarly, the second driving signal drive_2 is input from the control end of the second switch 20, and controls the second switch 20 to be turned on or off according to whether the second driving signal drive_2 reaches a certain output power, and when the second driving signal drive_2 is greater than a certain power threshold, the second switch is controlled to be turned on; when the second DRIVE signal drive_2 is less than a certain power threshold, the second switch is controlled to be turned off, and the second path of the second switch 20 is grounded, so that the whole DRIVE circuit 100 forms a complete loop.

The first driving signal drive_1 and the second driving signal drive_2 are driving signals amplified by a driving circuit in the circuit, and may be voltage signals, current signals, power signals, and the like. The first switch 10 and the second switch 20 are necessary components in the driving circuit 100, and different designs thereof have important effects on design complexity and manufacturing cost of the driving circuit 100. The first switch 10 is designed as a thyristor switch, which can effectively reduce the circuit complexity of the upper driving circuit, and simultaneously reduce the manufacturing cost of the driving circuit 100.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a driving circuit according to a second embodiment of the present application.

The driving circuit 100 further includes a first control module 30 and a second control module 40. The output end of the first control module 30 is connected to the control end of the first switch 10, and is configured to generate a first driving signal drive_1 according to a first control signal up_en to control the first switch 10 to be turned on or turned off, the input end of the first control module 30 is connected to the second power input end, and the control end of the first control module 30 is configured to receive the first control signal up_en; the output end of the second control module 40 is connected to the control end of the second switch 20, and is configured to control the second switch 20 to be turned on or off according to the second control signal drive_2, the input end of the second control module 40 is connected to the second power input end, and the control end of the second control module 40 is configured to receive the second control signal dw_en.

The first control module 30 is usually a first amplifying circuit, and determines on and off of the first control module 30 according to the first control signal up_en, and if the first control module 30 is on, the first control signal up_en is converted into a corresponding amplified first driving signal drive_1, so as to control on and off of the first switch 10; similarly, the second control module 40 is usually a second amplifying circuit, and determines on and off of the second control module 40 according to the second control signal dw_en, and if the second control module 40 is on, the second control signal dw_en is converted into a corresponding amplified second driving signal drive_2, so as to control on and off of the second switch 20.

The design of the first control module 30 and the design of the second control module 40 generally use a plurality of switching transistors, and determine whether the amplifying circuit is turned on or not according to the control signals including a high level signal and a low level signal. For example, when the first control signal up_en is a high level signal, the first control module 30 is turned on, generates the first driving signal drive_1, controls the first switch 10 to be turned on, and when the first control signal up_en is a low level signal, the first control module 30 is turned off, so that the first switch 10 is turned off. And when the second control signal dw_en is a high level signal, the second control module 40 is turned on to generate a second driving signal drive_2, and controls the second switch 20 to be turned on, and when the second control signal dw_en is a low level signal, the second control module 40 is turned off, so that the second switch 20 is turned off.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a third embodiment of a driving circuit provided in the present application.

The driving circuit 100 includes a second power source VCC, and the first control module 30 includes a third switch 31 and a fourth switch 32. The first path end of the third switch 31 is connected to the second power input end, and the second path end is connected to the control end of the first switch 10. The first path end of the fourth switch 32 is connected to the control end of the third switch 31, the second path end thereof is connected to the ground, and the control end receives the first control signal.

The second control module 40 of the driving circuit 100 includes a fifth switch 41 and a sixth switch 42. The first path terminal of the fifth switch 41 is connected to the second power input terminal, and the second path terminal thereof is connected to the control terminal of the second switch 20. The first path terminal of the sixth switch 42 is connected to the control terminal of the fifth switch 41, the second path terminal thereof is connected to the ground terminal, and the control terminal thereof receives the second control signal.

The second power supply is a driving power supply of the control circuit, and the first power supply is a working power supply of the driving circuit.

When the first control signal up_en is a high level signal, the control terminal of the fourth switch 32 receives the high level signal, the fourth switch 32 is turned on, so that the first path terminal of the fourth switch 32 is changed to the high level signal, the control terminal of the third switch 31 is changed to the high level signal, the third switch 31 is turned on, and the second power VCC provides the first control module 30 with a current control signal to turn on the first switch 10. The first power supply VDD provides a working power supply, and can generate a larger current signal to be transmitted to the output terminal.

When the second control signal dw_en is a high level signal, the control terminal of the sixth switch 42 receives the high level signal, the sixth switch 42 is turned on, so that the first path terminal of the sixth switch 42 is changed to the high level signal, the control terminal of the fifth switch 41 is changed to the high level signal, the fifth switch 41 is turned on, and the second power VCC provides the current control signal for the second control module 40 to turn on the second switch 20. The second power supply VDD provides a working power supply, and can generate a larger current signal to be transmitted to the output terminal.

Optionally, the third switch 31, the fourth switch 32, the fifth switch 41 and the sixth switch 42 are switching transistors or MOS transistors.

Optionally, the third switch 31 and/or the fifth switch 41 are NPN transistors, and the fourth switch 32 and/or the sixth switch 42 are PNP transistors.

A transistor, which is called a semiconductor transistor, is a semiconductor device for controlling a current, and functions to amplify a weak signal into an electric signal having a large amplitude, and also functions as a contactless switch. The transistor is one of the basic components of the semiconductor, has the function of amplifying current and is a core element of the electronic circuit. The triode is characterized in that two PN junctions which are very close to each other are manufactured on a semiconductor substrate, the whole semiconductor is divided into three parts by the two PN junctions, the middle part is a base region, the two sides of the base region are respectively an emitter region and a collector region, and PNP and NPN are arranged.

When the base of the transistor, i.e., the control terminal described herein, is high, the transistor is turned on. Therefore, the first control module 30 can be controlled to be turned on or off according to the first control signal, and when the first control module 30 is turned on, an amplified first driving signal is generated at the control end of the first switch 10 to drive the first switch 10 to be turned on, so that the upper half-bridge circuit is turned on; the second control module 40 can be controlled to be turned on or off according to the second control signal, when the second control module 40 is turned on, an amplified second driving signal is generated at the control end of the second switch 20 to drive the second switch 20 to be turned on, so that the lower half-bridge circuit is turned on; the upper half-bridge circuit and the lower half-bridge circuit cannot be conducted simultaneously, so that a target signal cannot be output to the output end.

Optionally, the second switch 20 is a MOS transistor, an IGBT switch transistor, or a GTR switch transistor.

In an actual circuit, at least two driving circuits are usually used to form an H-bridge or star-shaped driving circuit to drive external equipment to rotate. Referring specifically to fig. 4, fig. 4 is a schematic structural diagram of a first embodiment of a driving device provided in the present application.

The driving apparatus 500 includes a controller 200 and a driving circuit 400.

The controller 200 serves as a core processor of the whole driving device 500, and reasonably outputs corresponding control signals according to the target operation condition of the driving device 500. The controller 200 has a plurality of level control pins, each of which can output a high level signal and a low level signal. When the level control pin is connected to the signal receiving end of the driving circuit 400, the driving circuit 400 can be controlled to be turned on or off according to the level signal output by the level control pin.

Alternatively, the controller 200 may be a single-chip microcomputer or an ARM processor.

The driving circuit 400 includes at least one driving circuit, and thus has at least one control signal input terminal, each of which controls the on and off of a group of switching devices in one driving circuit.

The external device 300 is an actuator for outputting a signal from the driving device 500, and when the driving circuit 400 is turned on, the external device 300 is controlled to rotate, and the external device 300 is exemplified as a motor in this application. When the motor is of a single-phase brushless dc motor or a three-phase brushless dc motor, the external device 300 has a rotor position sensor for detecting a position signal of the rotor, and the switching tubes connected to the armature windings through the driving circuit 400 are turned on or off to control the energization of the stator windings, thereby generating a rotating magnetic field on the stator to drag the rotor to rotate, and the position sensor continuously transmits a signal as the rotor rotates to change the energization state of the armature, so that the current direction in the conductors under the same magnetic pole is unchanged, and a constant torque is generated to rotate the motor; when the motor is of the type of a direct current brush motor, the direction of the generated current can be changed by turning on or off the respective switching tubes connected to the armature winding by the driving circuit 400. The stator of the brush motor is provided with a fixed main magnetic pole and an electric brush, and the rotor is provided with an armature winding and a commutator. The electric energy of the direct current power supply enters the armature winding through the electric brush and the commutator to generate armature current, and the magnetic field generated by the armature current interacts with the main magnetic field to generate electromagnetic torque so as to enable the motor to rotate. Since the driving circuit 400 generates currents in different directions, the motor can be driven to rotate in different directions according to the currents.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a second embodiment of a driving device provided in the present application.

The driving device 500 includes a first power source 50, a second power source 60, a controller 200, a first driving circuit 110, and a second driving circuit 120.

The first power supply 50 is a driving power supply of the driving circuit, and provides power for the first driving circuit 110 and the second driving circuit 120. The second power supply 60 is an input power supply of the control circuit of each driving circuit, and supplies power to a plurality of control circuits. The controller 200 provides control signals to the first driving circuit 110 and the second driving circuit 120 to drive the external device motor 300 to rotate.

Specifically, referring to fig. 6, fig. 6 is a schematic structural diagram of a third embodiment of a driving device provided in the present application.

The driving device 500 includes two driving circuits, namely a first driving circuit 110 and a second driving circuit 120, wherein the first driving circuit 110 includes a first switch 11 and a second switch 21, and the second driving circuit 120 includes a first switch 12 and a second switch 22, and the first switch 11 in the first driving circuit and the first switch 12 in the second driving circuit are silicon controlled switches.

The driving principle of the driving device 500 is that the controller 200 outputs a first control signal and a second control signal to the first driving circuit 110, wherein the first control signal is a first level signal, and the second control signal is a second level signal, and the first level signal is opposite to the second level signal. Assuming that the first level signal is a high level signal and the second level signal is a low level signal, the first control signal controls the first switch of the corresponding first driving circuit to be turned on, and the second control signal controls the second switch of the corresponding first driving circuit to be turned off; the controller 200 outputs a third control signal and a fourth control signal to the second driving circuit 120, where the third control signal is a second level signal, and the fourth control signal is a first level signal, so as to control the second switch of the corresponding second driving circuit to be turned on and the first switch to be turned off. In the above manner, the external device 300 can be driven to rotate.

When the controller 200 adjusts the first control signal and the fourth control signal to the second level signal and the second control signal and the third control signal to the first level signal, the power-on direction of the external device may be changed.

According to fig. 6, the present application proposes a driving flow chart of a driving device.

Specifically, referring to fig. 7, fig. 7 is a schematic diagram of an embodiment of a driving flow of a driving device provided in the present application.

Specifically, the external device 300 is first judged to be either forward powered on or reverse powered on, with the power on direction being manually set for either forward or reverse. If it is determined that the external device 300 is powered on in the forward direction, the first switch 11 of the first driving circuit 110 and the second switch 22 of the second driving circuit 120 are turned on, so that the external device is powered on in the forward direction, the external device is driven to rotate, whether the external device turns or not is determined again, if the external device 300 turns, the first switch 11 of the first driving circuit 110 and the second switch 22 of the second driving circuit 120 are turned off, and if the external device 300 does not turn, the two switches are continuously turned on.

Similarly, when the external device 300 is reversely energized, the first switch 12 of the second driving circuit 120 and the second switch 21 of the first driving circuit 110 are turned on, so that the external device is reversely energized, the external device is driven to rotate, whether the external device turns or not is judged again, if the external device 300 turns, the first switch 12 of the second driving circuit 120 and the second switch 21 of the first driving circuit 110 are turned off, and if the external device does not turn, the two switches are continuously turned on.

Alternatively, the three-phase dc motor may be driven to operate by a driving circuit 400 composed of three driving circuits.

Specifically, referring to fig. 8, fig. 8 is a schematic structural diagram of a fourth embodiment of a driving device provided in the present application.

The driving apparatus 500 includes a first driving circuit 110, a second driving circuit 120, and a third driving circuit 130 in addition to the power supply 50, the second power supply 60, and the controller 200.

In this embodiment, three driving circuits constitute a driving circuit 400 for driving the three-phase dc motor 300, and the controller 200 provides control signals to the first driving circuit 110, the second driving circuit 120, and the third driving circuit 130.

The three-phase direct current motor comprises three ports in total, and each port can be used as an input port and an output port. Thus, the combination of two by two produces 6 energizing directions in total. During each power-on, an electrical signal is input from one of the three ports, and an electrical signal is output from the other port, so that two driving circuits are involved in the control of the rotation of the external device motor 300 during each power-on.

Taking the first driving circuit 110 and the second driving circuit 120 as examples, the controller 200 outputs a first control signal and a second control signal to the first driving circuit 110; the first control signal is a first level signal and is used for controlling the corresponding first switch to be opened, the second control signal is a second level signal and is used for controlling the corresponding second switch to be closed, and the first level signal and the second level signal are opposite; and simultaneously, outputting a third control signal and a fourth control signal to the second driving circuit, wherein the third control signal is a second level signal and is used for controlling the corresponding first switch to be closed, and the fourth control signal is a first level signal and is used for controlling the corresponding second switch to be opened. Thus, the direct current three-phase motor is turned on by inputting an electrical signal from the first port and outputting an electrical signal from the second port.

Next, the first control signal is adjusted to a second level signal, and the second control signal is the first level signal to control the first switch of the first driving circuit 110 to be turned off and the second switch to be turned on; meanwhile, the third control signal is adjusted to be a first level signal, and the fourth control signal is adjusted to be a second level signal, so as to control the first switch of the second driving circuit 120 to be turned on and the second switch to be turned off. Thus, the direct current three-phase motor is turned on by inputting an electrical signal from the second port and outputting an electrical signal from the first port.

And similarly, the subsequent four external device electrifying conditions can be obtained.

Referring to fig. 4 to 8, the driving circuit 400 provided in the present application may be composed of at least one driving circuit, and the driving circuit 400 may be applied to a single-phase dc motor, a three-phase dc motor, a dc brush motor, and a dc brushless motor. The driving circuit is controlled to be turned on and off corresponding to the switch by a plurality of control signals outputted from the controller 200, so that the external device 300 is rotated in a target direction.

In contrast to the prior art, the present application provides a driving circuit and a driving device, the driving circuit includes at least one driving circuit, each driving circuit includes: the first switch, its first access end connects the first power input end, its second access end connects the output end, its control end controls the first driving signal that the first control module produces to control the first switch to turn on or off according to the first control signal; the first passage end of the second switch is connected with the output end, the second passage end of the second switch is connected with the ground end, and the control end of the second switch controls the second driving signal generated by the second control module to control the second switch to be turned on or turned off according to the second control signal; the first switch is a silicon controlled switch. The controllable silicon switch has the advantages of quick on and off, meanwhile, the design of the driving circuit can be simplified by setting the first switch of the driving circuit as the controllable silicon switch, the design of bootstrap capacitor and other related circuits is omitted, and the controllable silicon has the advantages of low manufacturing cost, contribution to the production and manufacture of the driving circuit and the like. In conclusion, the novel energy-saving device has the advantages of being simple in structure, low in manufacturing cost and the like.

The foregoing description is only exemplary embodiments of the present application and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims (10)

1. A driving circuit, characterized in that the driving circuit comprises:

the first switch is connected with a first power input end at a first passage end, is connected with external equipment at a second passage end, and is used for receiving a first driving signal to control the on or off of the first switch at a control end;

the first passage end of the second switch is connected with the external equipment, the second passage end of the second switch is connected with the ground, and the control end of the second switch is used for receiving a second driving signal to control the on or off of the second switch;

wherein the first switch is a silicon controlled switch.

2. The driving circuit according to claim 1, wherein,

the driving circuit further includes:

the input end of the first control module is connected with the second power input end, the output end of the first control module is connected with the control end of the first switch so as to output the first driving signal, and the control end of the first control module is used for receiving the first control signal;

the input end of the second control module is connected with the second power input end, the output end of the second control module is connected with the control end of the second switch so as to output the second driving signal, and the control end of the second control module is used for receiving the second control signal.

3. The driving circuit according to claim 2, wherein,

the first control module includes:

the first passage end of the third switch is connected with the second power input end, and the second passage end of the third switch is connected with the control end of the first switch;

and the first passage end of the fourth switch is connected with the control end of the third switch, the second passage end of the fourth switch is connected with the ground end, and the control end of the fourth switch receives the first control signal.

4. The driving circuit according to claim 3, wherein,

the third switch is an NPN triode, and the fourth switch is a PNP triode.

5. The driving circuit according to claim 2, wherein,

the second control module includes:

a fifth switch, the first passage end of which is connected with the second power input end, and the second passage end of which is connected with the control end of the second switch;

and the first passage end of the sixth switch is connected with the control end of the fifth switch, the second passage end of the sixth switch is connected with the ground end, and the control end of the sixth switch receives the second control signal.

6. The driving circuit according to claim 5, wherein,

the fifth switch is an NPN triode, and the sixth switch is a PNP triode.

7. The driving circuit according to claim 1, wherein,

the second switch is a MOS transistor.

8. A driving device, characterized in that the driving device comprises:

the output end of each driving circuit is connected with external equipment; wherein the driving circuit is the driving circuit according to any one of claims 1 to 7;

and the controller is connected with the driving circuit and used for controlling the driving circuit to drive the external equipment.

9. The driving device according to claim 8, wherein,

the driving device at least comprises a first driving circuit and a second driving circuit, and the controller is used for:

outputting a first control signal and a second control signal to the first driving circuit; the first control signal is a first level signal and is used for controlling a first switch in the first driving circuit to be turned on, and the second control signal is a second level signal and is used for controlling a second switch in the first driving circuit to be turned off;

outputting a third control signal and a fourth control signal to the second driving circuit; the third control signal is a second level signal and is used for controlling the first switch in the second driving circuit to be closed, and the fourth control signal is a first level signal and is used for controlling the second switch in the second driving circuit to be opened;

wherein the first level signal and the second level signal are opposite in level.

10. The driving device according to claim 9, wherein,

the controller is further configured to:

adjusting the first control signal to the second level signal to control the first switch in the first driving circuit to be closed, and adjusting the second control signal to the first level signal to control the second switch in the first driving circuit to be opened;

the third control signal is adjusted to be the first level signal so as to control the first switch in the second driving circuit to be opened, and the fourth control signal is adjusted to be the second level signal so as to control the second switch in the second driving circuit to be closed.