CN216353973U - Efficient and energy-saving contactor control circuit - Google Patents
Efficient and energy-saving contactor control circuit Download PDFInfo
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- CN216353973U CN216353973U CN202122414721.5U CN202122414721U CN216353973U CN 216353973 U CN216353973 U CN 216353973U CN 202122414721 U CN202122414721 U CN 202122414721U CN 216353973 U CN216353973 U CN 216353973U
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Abstract
The utility model discloses a high-efficiency energy-saving electromagnetic control circuit, which belongs to the technical field of contactors and comprises: the device comprises a full-bridge driving chip U1 for controlling the function of a contactor, an energy storage circuit connected with a power supply, a voltage stabilizing circuit connected with the energy storage circuit and used for stabilizing an input voltage and then sending the input voltage into the full-bridge driving chip U1, a voltage signal detection regulating circuit connected with the power supply and used for detecting, regulating and filtering an input voltage signal and protecting overvoltage, a three-stage phase inverter connected with the voltage signal detection regulating circuit, a pull-in delay regulating circuit used for controlling the output of pull-in voltage to enable a coil of a contactor KM to be powered on in a forward direction and then to be turned off in a delayed manner, and a release delay regulating circuit used for controlling the output of release voltage to enable the coil of the contactor KM to be powered on in a reverse direction and then to be turned off in a delayed manner; the efficient energy-saving contactor control circuit has an obvious energy-saving effect, and the energy-saving effect can reach more than 98%; realize single line inching control switching.
Description
Technical Field
The utility model belongs to the technical field of electromagnetic control, and particularly relates to a high-efficiency energy-saving contactor control circuit.
Background
Compared with a common contactor, the magnetic latching contactor has the greatest difference that the magnetic latching contactor is mainly applied to high-current on-off control of intensive installation environments or special equipment, and is mainly characterized in that only one positive or reverse instantaneous pulse is required to be applied to a coil for on-off operation of a main loop, and because a permanent magnet material is used as the main loop closing power, the contact pressure of the main loop is high, the working voltage is high, the contact resistance is small, the magnetic latching contactor is energy-saving and environment-friendly, the magnetic latching contactor can run reliably in an overlong running working state and the coil hardly generates energy consumption;
the magnetic latching contactor control switch-on and switch-off needs the impulse voltage of two forward or reverse states, compare with ordinary contactor, control scheme is complicated, if in some lathe electrical apparatus control's traditional application, must change control scheme, the circuit changes and gets up complicacy very much and the reliability is poor, the biggest problem can not solve the problem that the power failure can't be disconnected, the security can't be ensured, can not be in general logic control electric circuit wide application, consequently, need research and development a neotype contactor circuit and solve current problem.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a high-efficiency energy-saving contactor control circuit to solve the problem that a magnetic latching contactor cannot be controlled to be opened and closed through single-wire inching.
In order to achieve the purpose, the utility model provides the following technical scheme: an energy efficient contactor control circuit comprising: the device comprises a full-bridge driving chip U1 used for controlling the function of a contactor KM, an energy storage circuit connected with a power supply, a voltage stabilizing circuit connected with the energy storage circuit and used for stabilizing an input voltage and then sending the input voltage into the full-bridge driving chip U1, a voltage signal detection regulating circuit connected with the power supply and used for detecting, regulating and filtering an input voltage signal and protecting overvoltage, a three-stage phase inverter connected with the voltage signal detection regulating circuit, a pull-in delay regulating circuit used for controlling the output of pull-in voltage to enable a coil of the contactor KM to be powered on in the forward direction and then to be turned off in a delayed manner, and a release delay regulating circuit used for controlling the output of release voltage to enable the coil of the contactor KM to be powered on in the reverse direction and then to be turned off in a delayed manner;
the pull-in delay adjusting circuit and the release delay adjusting circuit are both connected with the three-level phase inverter.
Preferably, the energy storage circuit comprises a diode D10, a diode D3 connected to one end of the diode D10 for absorbing the reverse electromotive force generated when the coil operates, and an energy storage capacitor C1 connected to the other end of the diode D10;
the diode D10 is connected in parallel with a resistor R8, and nodes of the resistor R8, the diode D3 and the diode D10 are connected to a VBB pin of the full-bridge driving chip U1.
Preferably, the voltage stabilizing circuit comprises a voltage stabilizing tube DW2 and a resistor R1 connected with the voltage stabilizing tube DW 2; the resistor R1 and the VBB pin of the full-bridge driving chip U1 are both connected to the positive electrode of the power supply, and the node of the resistor R1 and the voltage regulator tube DW2 is connected with the Vref pin of the full-bridge driving chip U1.
Preferably, the voltage signal detection and adjustment circuit comprises a voltage-regulator tube DW1, an energy-storage capacitor C3 and a resistor R5 which are connected in parallel with the voltage-regulator tube DW1, and a resistor R4 connected with the voltage-regulator tube DW1, wherein the resistor R4 is also connected with the anode of the power supply, and the resistance ratio of the resistor R4 and the resistor R5 is adjusted to adjust the switching threshold of the pull-in voltage and the release voltage in the process of slowly increasing or decreasing the voltage of the power supply.
Preferably, the three-stage inverter comprises three first-stage inverters U2A, second-stage inverters U2B and third-stage inverters U2C which are connected in series; the first-stage inverter U2A is connected with the nodes of the voltage-regulator tube DW1 and the resistor R4, the output end of the second-stage inverter U2B obtains a level signal synchronous with input, and the output end of the third-stage inverter U2C obtains a level signal inverted with the input end of the first-stage inverter U2A.
Preferably, the pull-in delay adjusting circuit comprises a triode V1, a resistor R2 and a resistor R3 connected to the base of the triode V1, a resistor R6 connected to the collector of the triode V1, and an energy storage capacitor C2 connected in series to the resistor R3; the node of the resistor R6 and the triode V1 is connected with an IN2 pin of a full-bridge driving chip U1, wherein the capacitance value of the C2 is adjusted, the resistance ratio of the resistor R2 to the resistor R3 is adjusted, so that when the output end of the second-stage inverter U2B is turned from low to high, the capacitor C2 is charged, and when the voltage at the two ends of the capacitor C2 reaches the conduction threshold of the triode V1 collector, the delay duration of a high-level signal of the IN2 pin of the full-bridge driving chip U1 is controlled.
Preferably, the release delay circuit comprises a triode V2, a resistor R11 connected to the base of the triode V2, an energy storage capacitor C4, a resistor R10 connected in parallel to the energy storage capacitor C4, and a resistor R9 connected to the collector of the triode V2; one end of the resistor R9 is connected with the third-stage inverter U2C, and the other end of the resistor R9 is connected with the IN1 pin of the full-bridge driving chip U1 after being connected with the triode V2, wherein the capacitance of the C4, the resistance ratio of the resistor R11 and the resistor R10 are adjusted, so that when the output end of the third-stage inverter U2C turns from low to high, the capacitor C4 is charged, and when the voltage at the two ends of the capacitor C4 reaches the conduction threshold of the triode V2 base, the delay duration time of the high-level signal of the IN1 pin of the full-bridge driving chip U1 is controlled.
Preferably, one end of a resistor R7 for current limiting protection is connected to an Lss pin of the full-bridge driver chip U1, the other end of the resistor R7 is connected in series with a diode D4 and a diode D2, one end of the diode D2 is connected to a node of a diode D10 and a resistor R1, a node of the resistor R7 and a node of a diode D4 is connected to one end of the diode D5, the other end of the diode D5 is connected to the other end of the diode D3, an OUT1 pin and an OUT2 pin of the full-bridge driver chip U1 are connected to a coil of a contactor KM, and an OUT2 pin of the full-bridge driver chip U1 is connected to a coil of the contactor KM and then connected to a node of a diode D3 and a diode D5.
Preferably, the input end of the power supply is provided with a rectifier for converting an alternating voltage into a direct voltage.
Preferably, a transformer is arranged at the input end of the rectifier.
The utility model has the technical effects and advantages that: the efficient and energy-saving contactor control circuit has the advantages that the circuit is simplified, the size is small, the cost is low, the voltage stabilizing diode DW1 is used for preventing the three-level inverter from being damaged when a power supply is raised or debugged, the reverse electromotive force generated when the coil works can be absorbed through the diode D2, the diode D3, the diode D4 and the diode D5, and the R7 is a current-limiting protection sampling resistor; the circuit enables the magnetic latching contactor to completely replace an energy-saving control module of a traditional common contactor, is simple and convenient to install and wire, has an obvious energy-saving effect, and can achieve more than 98 percent of the energy-saving effect; the magnetic latching contactor using the control module can have the characteristics of a common non-magnetic latching contactor, single-wire inching control on-off is achieved, all advantages of the magnetic latching contactor are retained, IN addition, a resistor R2 and a resistor R3 at the output end of a second-stage phase inverter U2B IN the circuit are connected IN series for voltage division and then connected with a base electrode of a triode V1, a capacitor C2 is charged, when the charging voltage reaches the conduction threshold value of a triode V1, the level of an IN2 pin of a full-bridge driving chip U1 is pulled down, OUT1 and OUT2 pins of the full-bridge driving chip U1 output high resistance, a contactor KM coil is de-energized, and the coil current is zero; in the state, the contactor KM always keeps the contact of a main loop in a closed state by attracting a permanent magnet, the current of a coil of the contactor KM is zero, the coil has zero power consumption, the sum of the energy consumption of a divider resistor, a voltage regulator tube and a chip in the circuit in the state is about 0.2W, the maintenance power of a general contactor is about 10W-30W, and the coil control circuit of the contactor KM is in a micro-power consumption state relative to the power consumption of 0.2W.
Drawings
FIG. 1 is a control circuit diagram of the present invention when the power source is DC;
FIG. 2 is a control circuit diagram of the present invention when the power source is AC/DC;
FIG. 3 is a control circuit diagram of the power supply of the present invention when the power supply is AC 0V-1500V;
FIG. 4 is a functional block diagram of a full bridge driver chip U1 according to the present invention;
fig. 5 is a pin layout diagram of the full bridge driver chip U1 according to the present invention.
In the figure: 1. a tank circuit; 2. a voltage stabilizing circuit; 3. a voltage signal detection circuit; 4. a three-level inverter; 5. a pull-in delay adjusting circuit; 6. the delay adjusting circuit is released.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides a high efficiency, energy efficient contactor control circuit as shown in fig. 1-5, as shown in fig. 1 and 4, comprising: the device comprises a full-bridge driving chip U1 for controlling the function of a contactor KM, an energy storage circuit 1 connected with a power supply, a voltage stabilizing circuit 2 connected with the energy storage circuit 1 and used for stabilizing an input voltage and then sending the input voltage into the full-bridge driving chip U1, a voltage signal detection and adjustment circuit 3 connected with the power supply and used for detecting, adjusting and filtering the input voltage signal and protecting overvoltage, a three-stage phase inverter 4 connected with the voltage signal detection and adjustment circuit 3, a pull-in delay adjustment circuit 5 used for controlling the output of pull-in voltage to enable a coil of the contactor KM to be powered on in a forward direction and then to be turned off in a delayed manner, and a release delay adjustment circuit 6 used for controlling the output of release voltage to enable the coil of the contactor KM to be powered on in a reverse direction and then to be turned off in a delayed manner;
the pull-in delay adjusting circuit 5 and the release delay adjusting circuit 6 are both connected with the three-level phase inverter 4.
The energy storage circuit 1 comprises a diode D10, a diode D3 connected to one end of the diode D10 and used for absorbing the reverse electromotive force generated when the coil works, and an energy storage capacitor C1 connected to the other end of the diode D10;
the diode D10 is connected in parallel with a resistor R8, nodes of the resistor R8, the diode D3 and the diode D10 are connected with a VBB pin of the full-bridge driving chip U1, and the positive voltage supplies a power supply voltage to the VBB pin of the full-bridge driving chip U1 through the diode D1, and simultaneously charges the energy storage capacitor C1 through the buffer resistor R8;
the voltage stabilizing circuit 2 comprises a voltage stabilizing tube DW2 and a resistor R1 connected with the voltage stabilizing tube DW 2; the resistor R1 and the VBB pin of the full-bridge driving chip U1 are both connected to the positive electrode of the power supply, and the node of the resistor R1 and the voltage regulator DW2 is connected to the Vref pin of the full-bridge driving chip U1, in this embodiment, a voltage with a voltage stabilizing value of 5V is formed by dividing the voltage of the resistor R1 and the voltage regulator DW2, and is switched into the analog voltage input Vref pin of the full-bridge driving chip U1, as shown in fig. 5;
the voltage signal detection and adjustment circuit 3 comprises a voltage-regulator tube DW1, an energy-storage capacitor C3 and a resistor R5 which are connected in parallel with the voltage-regulator tube DW1, and a resistor R4 which is connected with the voltage-regulator tube DW1, wherein the resistor R4 is also connected with the anode of the power supply, the resistance ratio of the resistor R4 and the resistor R5 is adjusted, so that the switching threshold of pull-in and release voltage is adjusted in the process of slowly increasing or decreasing the power supply voltage, the pull-in characteristic in the process of slowly increasing the power supply voltage can be adjusted, and the pull-in voltage value is adjusted in the process of slowly increasing the power supply voltage, in the embodiment, the U2 is prevented from being damaged when the power supply is increased or debugged; the output terminal of the second-stage inverter U2B obtains a level signal synchronized with the input, and the output terminal of the third-stage inverter U2C obtains a level signal inverted from the input terminal of the first-stage inverter U2A.
The three-stage inverter 4 comprises a first-stage inverter U2A, a second-stage inverter U2B and a third-stage inverter U2C which are connected in series; the second-stage inverter U2B is connected with nodes of the voltage-regulator tube DW1 and the resistor R4, and the output end of the second-stage inverter U2B obtains a level signal synchronous with input and is connected with an IN2 pin of a full-bridge driving chip U1 through the resistor R6; the output end of the third-stage inverter U2C obtains a level signal with the phase opposite to the input end of the first-stage inverter U2A, the level signal is connected with an IN1 pin of a full-bridge driving chip U1 through a resistor R9, and the anode of a power supply is connected to the input end of the third-stage inverter 4 after being subjected to voltage division through a resistor R4 and a resistor R5; according to a truth table of the full-bridge driving chip U1, see table 1, the pin OUT1 of the full-bridge driving chip U1 outputs a positive electrode, the pin OUT2 of the full-bridge driving chip U1 outputs a negative power voltage, a coil of the contactor KM is electrified, the direction of magnetic force generated by the coil is reversed, and a main loop contact of the contactor KM is kept closed under the action of attracting a permanent magnet;
TABLE 1
The pull-in delay adjusting circuit 5 comprises a triode V1, a resistor R2 and a resistor R3 which are connected to the base of the triode V1, a resistor R6 connected to the collector of the triode V1, and an energy storage capacitor C2 connected in series to the resistor R3; the node of the resistor R6 and the triode V1 is connected with an IN2 pin of a full-bridge driving chip U1, wherein the capacitance value of the C2 is adjusted, and the resistance ratio of the resistor R2 to the resistor R3 is adjusted, so that when the level of the output end of the second-stage inverter U2B is turned from low to high, the delay duration of a high-level signal of the IN2 pin of the full-bridge driving chip U1 is controlled; when the power supply is powered on, the resistors R2 and R3 at the output end of the second-stage inverter U2B are connected IN series for voltage division and then connected with the base electrode of the triode V1 to charge the capacitor C2, when the charging voltage reaches the conduction threshold value of the triode V1, the level of the IN2 pin of the full-bridge driving chip U1 is pulled down, according to the truth table of the full-bridge driving chip U1, the OUT1 pin and the OUT2 pin of the full-bridge driving chip U1 output high resistance, the coil of the contactor KM is powered off, and the coil current is zero; at the moment, the contactor always keeps a main loop contact closed state by attracting a permanent magnet, the coil has zero power consumption, the sum of energy consumption of a divider resistor, a voltage regulator tube and a chip in the circuit in the state is about 0.2W, the maintenance power of the general contactor is about 10W-30W, and compared with the power consumption of 0.2W, in the embodiment, the contactor KM coil control circuit is in a micro-power consumption state;
the release delay circuit 6 comprises a triode V2, a resistor R11 connected to the base of a triode V2, an energy storage capacitor C4, a resistor R10 connected to the energy storage capacitor C4 in parallel, and a resistor R9 connected to the collector of a triode V2; one end of the resistor R9 is connected with the third-stage inverter U2C, the other end of the resistor R9 is connected with the triode V2 and then connected with the IN1 pin of the full-bridge driving chip U1, the capacitance value of the C4 is adjusted, the resistance ratio of the resistor R11 and the resistor R10 is adjusted, when the level of the output end of the third-stage inverter U2C is turned over from low to high, the delay duration time of a high level signal of the IN2 pin of the full-bridge driving chip U1 is controlled, when the power supply is powered off, the energy storage capacitor C1 discharges and continues to supply electric energy to the full-bridge driving chip U1 through the diode D10, as the diode D1 is cut off reversely, the high level appears at the third-stage inverting output end of the third-stage inverter 4, according to a truth table, the OUT1 and OUT2 pins of the full-bridge driving chip U1 are instantaneously turned over, the OUT1 pin of the full-bridge driving chip U1 outputs a negative pole, the OUT2 pin of the full-bridge driving chip U1 outputs a positive pole, and the coil of the energy storage capacitor C1 is powered on, the magnetic direction state of the coil is turned, the contact of the main loop of the contactor KM keeps an off state under the action of releasing the permanent magnet, the resistor R10 and the resistor R11 at the output end of the third-stage inverter U2C are connected in series for voltage division and then are connected with the base electrode of the triode V2, meanwhile, the capacitor C4 is charged, when the voltage at the two ends of the capacitor C4 reaches the conduction threshold of the triode V2 collector base, the time delay duration of the high level signal at pin IN1 of the full bridge driver chip U1 is controlled, the pin IN2 of the full bridge driver chip U1 is pulled low, according to a truth table of a full-bridge driving chip U1, an OUT1 pin and an OUT2 pin of the full-bridge driving chip U1 output high resistance, a coil of a contactor KM is powered off, and the current of the coil is zero instantly, so that the circuit has the functions of enabling the coil to be electrified reversely and releasing a delay adjusting circuit to send a power-off signal to the full-bridge driving chip U1, enabling the coil to enter a zero-current state quickly after being powered off, and preventing the coil from being electrified all the time under low voltage; the coil is powered off immediately after being powered on and delayed, and the coil obtains two voltage pulse signals with opposite polarities under the two states of controlling the power supply to be powered on and powered off, so that the attraction characteristics of the magnetic latching contactor and the non-magnetic latching contactor are the same, and the purposes of high efficiency and energy conservation are achieved; the Lss pin of the full-bridge driving chip U1 is connected with one end of a resistor R7 for current limiting protection, the other end of the resistor R7 is connected with a diode D4 and a diode D2, one end of a diode D2 is connected with a node of a diode D10 and a resistor R1, a node of the resistor R7 and a node of a diode D4 is connected with one end of a diode D5, the other end of the diode D5 is connected with the other end of the diode D3, an OUT1 pin and an OUT2 pin of the full-bridge driving chip U1 are connected with a coil of a contactor KM, and an OUT2 pin of the full-bridge driving chip U1 is connected with the coil of the contactor KM and then connected with a node of a diode D3 and a diode D5.
As shown in fig. 2, if the control power supply is for ac/dc current, the input terminal of the power supply is connected to the power supply through the rectifier, and the rectifier converts the ac voltage into the dc voltage;
as shown in fig. 3, if the access control power supply is ac high voltage, the input end of the rectifier is connected to the input end of the transformer.
The efficient and energy-saving contactor control circuit has the advantages that the circuit is simplified, the size is small, the cost is low, the voltage stabilizing diode DW1 is used for preventing the three-level inverter from being damaged when a power supply is raised or debugged, the reverse electromotive force generated when the coil works can be absorbed through the diode D2, the diode D3, the diode D4 and the diode D5, and the R7 is a current-limiting protection sampling resistor; the circuit enables the magnetic latching contactor to completely replace an energy-saving control module of a traditional common contactor, is simple and convenient to install and wire, has an obvious energy-saving effect, and can achieve more than 98 percent of the energy-saving effect; the magnetic latching contactor using the control module can have the characteristics of a common non-magnetic latching contactor, realizes single-wire inching control on-off, and retains all the advantages of the magnetic latching contactor.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a contactor control circuit of high-efficient energy-conserving which characterized in that: the method comprises the following steps: the device comprises a full-bridge driving chip U1 used for controlling the function of a contactor KM, an energy storage circuit connected with a power supply, a voltage stabilizing circuit connected with the energy storage circuit and used for stabilizing an input voltage and then sending the input voltage into the full-bridge driving chip U1, a voltage signal detection regulating circuit connected with the power supply and used for detecting, regulating and filtering an input voltage signal and protecting overvoltage, a three-stage phase inverter connected with the voltage signal detection regulating circuit, a pull-in delay regulating circuit used for controlling the output of pull-in voltage to enable a coil of the contactor KM to be powered on in the forward direction and then to be turned off in a delayed manner, and a release delay regulating circuit used for controlling the output of release voltage to enable the coil of the contactor KM to be powered on in the reverse direction and then to be turned off in a delayed manner;
the pull-in delay adjusting circuit and the release delay adjusting circuit are both connected with the three-level phase inverter.
2. A high efficiency energy saving contactor control circuit as claimed in claim 1 wherein: the energy storage circuit comprises a diode D10, a diode D3 connected to one end of the diode D10 and used for absorbing the reverse electromotive force generated when the coil works, and an energy storage capacitor C1 connected to the other end of the diode D10;
the diode D10 is connected in parallel with a resistor R8, and nodes of the resistor R8, the diode D3 and the diode D10 are connected to a VBB pin of the full-bridge driving chip U1.
3. A high efficiency energy saving contactor control circuit as claimed in claim 1 wherein: the voltage stabilizing circuit comprises a voltage stabilizing tube DW2 and a resistor R1 connected with a voltage stabilizing tube DW 2; the resistor R1 and the VBB pin of the full-bridge driving chip U1 are both connected to the positive electrode of the power supply, and the node of the resistor R1 and the voltage regulator tube DW2 is connected with the Vref pin of the full-bridge driving chip U1.
4. A high efficiency energy saving contactor control circuit as claimed in claim 1 wherein: the voltage signal detection and adjustment circuit comprises a voltage-stabilizing tube DW1, a filter capacitor C3 and a resistor R5 which are connected in parallel with the voltage-stabilizing tube DW1, and a resistor R4 connected with the voltage-stabilizing tube DW1, wherein the resistor R4 is also connected with the anode of a power supply, and the resistance ratio of the resistor R4 and the resistor R5 is adjusted to adjust the switching threshold of pull-in voltage and release voltage in the process of slowly increasing or decreasing the power supply voltage.
5. A high efficiency energy saving contactor control circuit as claimed in claim 1 wherein: the three-stage inverter comprises a first-stage inverter U2A, a second-stage inverter U2B and a third-stage inverter U2C which are connected in series; the first-stage inverter U2A is connected with nodes of a voltage regulator DW1 and a resistor R4, the output end of the second-stage inverter U2B obtains a level signal synchronous with input, and the output end of the third-stage inverter U2C obtains a level signal inverted with the input end of the first-stage inverter U2A.
6. A high efficiency energy saving contactor control circuit as claimed in claim 1 wherein: the pull-in delay adjusting circuit comprises a triode V1, a resistor R2 and a resistor R3 which are connected to the base electrode of the triode V1, a resistor R6 connected to the collector electrode of the triode V1, and an energy storage capacitor C2 connected to the resistor R3 in series; the node of the resistor R6 and the triode V1 is connected with an IN2 pin of a full-bridge driving chip U1, wherein the capacitance value of the C2 is adjusted, the resistance ratio of the resistor R2 to the resistor R3 is adjusted, so that when the output end of the second-stage inverter U2B is turned from low to high, the capacitor C2 is charged, and when the voltage at the two ends of the capacitor C2 reaches the conduction threshold of the triode V1 collector, the delay duration of a high-level signal of the IN2 pin of the full-bridge driving chip U1 is controlled.
7. A high efficiency energy saving contactor control circuit as claimed in claim 1 wherein: the release delay adjusting circuit comprises a triode V2, a resistor R11 connected to the base of a triode V2, an energy storage capacitor C4, a resistor R10 connected to the energy storage capacitor C4 in parallel, and a resistor R9 connected to the collector of a triode V2; one end of the resistor R9 is connected with a third-stage inverter U2C, and the other end of the resistor R9 is connected with the triode V2 and then connected with an IN1 pin of a full-bridge driving chip U1; when the output end of the third-stage inverter U2C is turned from low to high by adjusting the capacitance value of the C4 and the resistance value ratio of the resistor R11 to the resistor R10, the capacitor C4 is charged, and when the voltage at two ends of the capacitor C4 reaches the conduction threshold of the triode V2 collector, the delay duration of a high-level signal of a pin IN1 of the U1 of the full-bridge driving chip is controlled.
8. A high efficiency energy saving contactor control circuit as claimed in claim 1 wherein: the Lss pin of the full-bridge driving chip U1 is connected with one end of a resistor R7 for current limiting protection, the other end of the resistor R7 is connected with a diode D4 and a diode D2 which generate reverse electromotive force when an absorption coil works in series, one end of a diode D2 is connected with a node of a diode D10 and a node of a resistor R1, a node of the resistor R7 and a node of a diode D4 is connected with one end of a diode D5 which generates reverse electromotive force when the absorption coil works, the other end of the diode D5 is connected with the other end of the diode D3, an OUT1 pin and an OUT2 pin of the full-bridge driving chip U1 are connected with a contactor KM coil, and an OUT2 pin of the full-bridge driving chip U1 is connected with the contactor KM coil and then connected with a node of a diode D3 and a diode D5.
9. A high efficiency energy saving contactor control circuit as claimed in any one of claims 1-8 wherein: the input end of the power supply is provided with a rectifier for converting alternating voltage into direct voltage.
10. The energy efficient contactor control circuit of claim 9, wherein: and a transformer is arranged at the input end of the rectifier.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122414721.5U CN216353973U (en) | 2021-10-08 | 2021-10-08 | Efficient and energy-saving contactor control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122414721.5U CN216353973U (en) | 2021-10-08 | 2021-10-08 | Efficient and energy-saving contactor control circuit |
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| CN216353973U true CN216353973U (en) | 2022-04-19 |
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| CN202122414721.5U Active CN216353973U (en) | 2021-10-08 | 2021-10-08 | Efficient and energy-saving contactor control circuit |
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