CN212625390U - Relay switch circuit and motor controller - Google Patents
Relay switch circuit and motor controller Download PDFInfo
- Publication number
- CN212625390U CN212625390U CN202021193532.9U CN202021193532U CN212625390U CN 212625390 U CN212625390 U CN 212625390U CN 202021193532 U CN202021193532 U CN 202021193532U CN 212625390 U CN212625390 U CN 212625390U
- Authority
- CN
- China
- Prior art keywords
- relay
- pin
- switching tube
- resistor
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a relay switch circuit and a motor controller, the relay switch circuit comprises a relay and a drive circuit, the 1 st pin and the 2 nd pin are connected at the two ends of a relay coil, and the 3 rd pin and the 4 th pin are connected at the two ends of a magnetic suction switch; the driving circuit comprises a switching tube Q, a resistor R1, a capacitor C1 and a diode D1, two ends of the diode D1 are connected with a 1 st pin and a 2 nd pin of the relay coil in parallel, and the positive electrode of the power supply is connected with the 1 st pin of the relay coil and the negative electrode end of the diode D1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected with the No. 2 pin of the relay coil, and the other end of the resistor R1 is connected with the collector of the switching tube Q; and the emitter of the switching tube Q is connected with the cathode of the power supply, and the base of the switching tube Q is used as the input end of the relay control signal. The relay has small current demand after the relay is attracted, reduces the burden of a microelectronic circuit, reduces the loss and heating of the relay and a switching tube for driving the relay, prolongs the service life and has low cost.
Description
Technical Field
The utility model relates to a relay switch circuit and machine controller.
Background
An automatic switching element having an isolation function of a relay and a control drive circuit thereof are widely used in electronic circuits because they are relatively simple.
However, the relay control section must generate enough suction force if it is necessary to pull the switch in, which requires a relatively large current. The driving circuit is shown in fig. 1, but this way of acquiring voltage has two inevitable disadvantages:
(1) the driving current required for the relay pull-in action is a great burden for the microelectronic circuit, especially for the circuit using the switching power supply to step down.
(2) The relay and the switching tube for driving the relay can generate heat due to overlarge current, and the aging of elements is aggravated.
(3) The use of more powerful components is necessary to generate the current required by the relay, increasing the design cost.
Disclosure of Invention
The utility model aims at providing a relay switch circuit and machine controller, solve prior art relay actuation required drive current of action big, lead to relay itself and drive relay's switch tube serious that generates heat, aggravate the ageing technical problem of component.
The utility model discloses a following technical scheme realizes:
a relay switch circuit comprising a relay and a drive circuit, wherein: two ends of a relay coil in the relay are connected with a pin 1 and a pin 2, and two ends of a magnetic switch in the relay are connected with a pin 3 and a pin 4; the method is characterized in that: the driving circuit comprises a switching tube Q, a resistor R1, a capacitor C1 and a diode D1, two ends of the diode D1 are connected with a 1 st pin and a 2 nd pin of the relay coil in parallel, and the positive electrode of the power supply is connected with the 1 st pin of the relay coil and the negative electrode end of the diode D1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected with the No. 2 pin of the relay coil, and the other end of the resistor R1 is connected with the collector of the switching tube Q; and the emitter of the switching tube Q is connected with the cathode of the power supply, and the base of the switching tube Q is used as the input end of the relay control signal.
A motor controller comprising a power circuit, wherein the power circuit includes a relay switch circuit, characterized in that: the relay switch circuit is the relay switch circuit.
Compared with the prior art, the utility model following technological effect has:
(1) the relay needs little current after actuation, reduces the burden of microelectronic circuit.
(2) Reduce relay itself and drive relay's switch tube self loss and generate heat, increase of service life.
(3) The relay requires less current and no high-power switching electronic components, thereby reducing the cost of the switching electronic components.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a circuit schematic of a prior art relay switch circuit.
Fig. 2 is a schematic circuit diagram of a relay switch circuit according to a first embodiment of the present invention.
Detailed Description
The first embodiment is as follows:
the present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 2, the utility model provides a relay switch circuit, including relay and drive circuit, wherein: two ends of a relay coil in the relay are connected with a pin 1 and a pin 2, and two ends of a magnetic switch in the relay are connected with a pin 3 and a pin 4; the method is characterized in that: the driving circuit comprises a switching tube Q, a resistor R1, a capacitor C1 and a diode D1, two ends of the diode D1 are connected with a 1 st pin and a 2 nd pin of the relay coil in parallel, and the positive electrode of the power supply is connected with the 1 st pin of the relay coil and the negative electrode end of the diode D1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected with the No. 2 pin of the relay coil, and the other end of the resistor R1 is connected with the collector of the switching tube Q; and the emitter of the switching tube Q is connected with the cathode of the power supply, and the base of the switching tube Q is used as the input end of the relay control signal.
The utility model discloses a theory of operation: when the input end of the relay control signal is at a low level, the switch tube Q is closed, no current passes through two ends of a relay coil in the relay, and the magnetic suction switch is disconnected, so that the 3 rd pin and the 4 th pin are disconnected; when the input end of the relay control signal is at a high level, the switching tube Q is switched on, current directly enters the relay coil at the starting instant and charges the capacitor C1, the starting instant current can realize the same starting current as the prior scheme, the capacitor C1 is charged after the relay is attracted, and the current passes through the resistor R1 and the internal resistance of the relay (namely the resistance of the relay coil), so that the current is reduced, and the derating is completed. The requirement for the electric current is little after the relay actuation promptly, can reduce microelectronic circuit's burden, reduces relay itself simultaneously and drive relay's switch tube self loss generate heat, increase of service life, and the required electric current of relay is few need not use powerful switch electronic component to reduce switch electronic component cost.
Example two:
a motor controller comprising a power circuit, wherein the power circuit includes a relay switch circuit, characterized in that: the relay switch circuit is the relay switch circuit in the first embodiment, the requirement for current is low after the relay is attracted, the burden of a microelectronic circuit can be reduced, the loss and the heat of the relay and a switch tube driving the relay are reduced, the service life is prolonged, the current required by the relay is less, and a high-power switch electronic element is not required, so that the cost of the switch electronic element is reduced.
Finally, it should be emphasized that the above-described embodiments are merely preferred examples of the present invention, and are not intended to limit the invention, as those skilled in the art will appreciate that various changes and modifications may be made, and any and all modifications, equivalents, and improvements made, while remaining within the spirit and principles of the present invention, are intended to be included within the scope of the present invention.
Claims (2)
1. A relay switch circuit comprising a relay and a drive circuit, wherein:
two ends of a relay coil in the relay are connected with a pin 1 and a pin 2, and two ends of a magnetic switch in the relay are connected with a pin 3 and a pin 4;
the method is characterized in that: the driving circuit comprises a switching tube Q, a resistor R1, a capacitor C1 and a diode D1, two ends of the diode D1 are connected with a 1 st pin and a 2 nd pin of the relay coil in parallel, and the positive electrode of the power supply is connected with the 1 st pin of the relay coil and the negative electrode end of the diode D1; after the resistor R1 and the capacitor C1 are connected in parallel, one end of the resistor R1 is connected with the No. 2 pin of the relay coil, and the other end of the resistor R1 is connected with the collector of the switching tube Q; and the emitter of the switching tube Q is connected with the cathode of the power supply, and the base of the switching tube Q is used as the input end of the relay control signal.
2. A motor controller comprising a power circuit, wherein the power circuit includes a relay switch circuit, characterized in that: the relay switch circuit of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021193532.9U CN212625390U (en) | 2020-06-24 | 2020-06-24 | Relay switch circuit and motor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021193532.9U CN212625390U (en) | 2020-06-24 | 2020-06-24 | Relay switch circuit and motor controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212625390U true CN212625390U (en) | 2021-02-26 |
Family
ID=74742913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021193532.9U Active CN212625390U (en) | 2020-06-24 | 2020-06-24 | Relay switch circuit and motor controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212625390U (en) |
-
2020
- 2020-06-24 CN CN202021193532.9U patent/CN212625390U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8248738B2 (en) | Switching device, high power supply system and methods for switching high power | |
| CN212676181U (en) | Relay drive circuit and power equipment applying same | |
| CN113067468B (en) | Integrated reverse connection prevention and high-side switch circuit and controller | |
| CN212625390U (en) | Relay switch circuit and motor controller | |
| JP5337685B2 (en) | Heat suppression circuit for relay excitation coil | |
| CN219937948U (en) | Surge current suppression circuit with time sequence control | |
| CN111130321A (en) | Single-power-supply negative-voltage power switch tube driving circuit | |
| CN201017742Y (en) | Electromagnetic brake control circuit used for air-jet loom | |
| CN205320053U (en) | Quick break -make direct current solid state relay | |
| CN211959179U (en) | Isolation driving electronic switch module | |
| CN201113886Y (en) | Voltage regulator for automobile generator | |
| CN214099502U (en) | Switch circuit for accelerating relay pull-in time and BLDC motor controller | |
| CN202586914U (en) | Engine starting motor electronic relay | |
| CN112467961A (en) | High-speed small-size large-current output switching circuit | |
| CN101719724A (en) | Quasi-level-switching device of multi-quasi-level power supply converter | |
| CN220556580U (en) | Relay control circuit | |
| CN217426636U (en) | Relay drive circuit that discharges slowly | |
| CN217387018U (en) | Relay switch | |
| CN217239188U (en) | Electromagnet release circuit | |
| CN113394053B (en) | Low-side driving circuit of vehicle-mounted relay | |
| CN210167315U (en) | Bistable relay | |
| CN111462976B (en) | Electromagnet driving circuit | |
| CN212781804U (en) | Constant current source driving electromagnetic lock circuit | |
| EP4080537A1 (en) | Control device and method for contactor | |
| CN215219125U (en) | Multi-station rapid charging and discharging device for high-voltage direct-current capacitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |