[0041] Next, the technical solutions in the embodiments of the present invention will be apparent from the embodiment of the present invention, and it is clearly described, and it is understood that the described embodiments are merely embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, there are all other embodiments obtained without making creative labor without making creative labor premises.
[0042] The present invention provides Figure 4 - Figure 8 A control circuit that uses a DC voltage to control an AC contactor, such as Figure 4 As shown, a power conversion allocation circuit 10 is configured to convert an alternating current to a first DC voltage V1 and a second DC voltage V2 and send it to an AC contactor coil input by high voltage DC 20 and low voltage DC circuits; The power conversion allocation circuit 10 includes a rectifier ZM1 for a direct current filtering of the AC reunion filter; in this embodiment, such as Figure 5 The first capacitor C1 is provided on the output of the rectifier ZM1, and the high voltage DC circuit 20 includes a second capacitor C2 that generates an alternating contactor to activate the desired current, the second capacitor C2 connected to the power conversion distribution circuit. 10. The other end is connected to the alternating contactor coil input by the relay contact point JK, and the high voltage DC circuit 20 is also provided with a current limiting protector for limiting the current in which the current is exceeded in the circuit; the limited flow protection The device is connected to both ends of the second capacitor C2.
[0043] The low voltage DC circuit includes: controlling the second DC voltage V2 to the voltage regulator power source A1 output by the set voltage value, and is used to compare the voltage comparison circuit 30 of the voltage regulated power source A1 output voltage, the receiving voltage comparison circuit 30 controls the signal and transmits the execution instruction. The delay circuit 40 for the relay coil J1; the voltage comparison circuit 30 includes a voltage comparator A2, the voltage comparator A2 and the voltage regulator power source A1; and the voltage comparator A2 transmits the control signal to the center. The delay circuit 40 includes a reverse device A3, in the present embodiment, the reverse device A3 is a dual input reverse, and the first input A31 receiving voltage comparator of the reverse device A3. A2 signal; the voltage comparison circuit 30 also includes a voltage regulator diode D1 and a first resistor R1 and a first resistor R1 and a third resistor R2 and a third resistor R3 that are connected in series, the regulated diode D1 and the first resistor R1. The output terminal of the regulator power source A1 is connected, and the second resistor R2 and the third resistor R3 are connected to the regulator power source A1 to which the low potential end is connected.
[0044] The input end of the regulator power source A1 is connected to the output terminal of the rectifier ZM1, and the forward input of the voltage comparator A2 is connected to the connection point between the regulator diode D1 and the first resistor R1 and measures the first comparison of the athletes. The voltage V3, the reverse input of the voltage comparator A2 is connected between the second resistor R2 and the third resistor R3 and measures the second comparison voltage V4 here; and the output terminal of the voltage comparator A2 passes the fourth The resistor R4 is connected to the triode T1, the triode T1 is connected to the relay coil J1 and the delay circuit 40. The delay circuit 40 further includes a fifth resistor R5 connected to the second resistor R4 connected to the second electrical resistance R4, one end is connected between the other end of the fifth resistor R5 and the reverser A3. The third capacitance C3 of the output low potential end of the regulated power source A1 is connected in parallel to the diode D2 of the fifth resistor R5. The first DC voltage V1 is used to cause an AC contactor to generate an absorbent action. The second DC voltage V2 is used to maintain an actuated state after the AC contactor is sucked.
[0045] A control method of controlling a control circuit of an alternating current contactor using a DC voltage, including the following steps, the AC input voltage is rectified into a first DC voltage V1, and the first DC voltage V1 voltage will pass parallel first resistance. R1, the second capacitor C2 and relay contact point JK is sent to the AC contactor coil, and the first resistor R1 provides currents in the loop and has a current limiting protection, preventing high voltage flow through the AC contact coil current too large and damage the coil and itself. product;
[0046] Since the second capacitance C2 is 0 V due to the first resistor R1, the second capacitor C2 forms a charging circuit through an alternating contactor coil, producing a large current in a short time, this current is It is the start current required for the AC contactor coil. When the AC220 AC voltage is sent, the relay contact point JK is turned on by the triode t1 controlled by the voltage comparison circuit 30, and the first DC voltage V1 is transmitted by the first resistor R1, the second capacitor. C2 flows through an alternating contactor coil to prevent the AC contactor; the second DC voltage V2 DC low pressure has been supplied to the AC contactor coil through the second pole tube D4 while the AC contactor is activated. The delay circuit 40 is based on the pre- When the triode T1 is set to the relay coil J1, the DC high pressure provided by the AC contact is disconnected, and the AC contactor continues to remain engaged under the second DC voltage V2 DC low pressure supply;
[0047] Relay coil J1 binding process: The second resistor R2 and the third resistance R3 resistance is 8: 2 series connected in the second DC voltage V2, the third resistor R3 preset 0.2 × V2 voltage is supplied to the voltage comparator A2 The forward input terminal of the reverse input, the regulator diode D1, and the first resistor R1 center point, the regulator diode D1 is, the voltage regulated value is 0.7 × V2, when the AC220 AC voltage is fed to regulatory At the time of power supply A1, the second DC voltage V2 started to be established. Since the regulator diode D1 is 0.7 × V2, the forward input voltage of the voltage comparator A2 is 0V before the valve value of the regulator diode D1 is not reached, and the voltage comparator A2 is 0V. The reverse input of the voltage comparator A2 increases with the third resistor R3 secondary 0.2 × V2 voltage, in which the reverse input terminal voltage of the voltage comparator A2 is higher than the forward direction of the voltage comparator A2. The output terminal of the voltage comparator A2 is low, and the triode T1 cutout relay coil J1 is turned off. When the second DC voltage V2 establishes the start of more than 0.7 × V2, the valve value of the regulator diode D1 exceeds 0.7 × V2 and breakdown, the forward input voltage of the voltage comparator A2 increases with the reverse input end voltage of the second DC voltage V2 and higher than the voltage comparator A2, the output terminal of the voltage comparator A2 is high. Flat, triode T1 conductive relay coil J1 absorption;
[0048] The relay coil J1 is disconnected: the output terminal voltage of the voltage comparator A2 is sent to the first input terminal A31 of the delay dual input reverser A3, and the fifth resistor R5, the diode D2 is sent to the reverse device A3. The second input terminal A32 is pairped and the third capacitor C3, the reverse device output terminal A33 is connected to the second diode D3 negative electrode, the second diode D3 positive electrode, and the base of the triode T1, in the voltage comparator A2 When the output is low, the second input terminal A32 of the reverse device A3 is also a low voltage, and the first input terminal A31 of the reverse device A3 is a low level, and the reverse device output terminal A33. It is a high level, and since the second diode D3 reverse isolation, there is no effect on the triode T1;
[0049]When the voltage comparator A2 is output to high, the first input terminal A31 of the reverse device A3 is a high level, and the influence of the second input terminal A32 third capacitance C3 of the reverse device A3 is still a low voltage, along with the first The three-capacitor C3 charge time increases, when the second input terminal A32 voltage of the reverse device A3 is increased to 0.9 × V2, the reverse device output terminal A33 is low, the second diode D3 is turned on, and the base of the triode T1 The extreme voltage change is low, and the triode T1 cutout relay coil J1 is disconnected;
[0050] In this embodiment, Image 6 As shown in the middle, when the second DC voltage V2 DC voltage begins to rise at 80 ms, the voltage value reaches 90% when it is 130 ms;
[0051] like Figure 7 As shown, when the second DC voltage V2 DC voltage rises to 90%, the voltage comparison circuit 30 starts generating a voltage jump, which is changed from the low level "0" to high "1", and the relay J1 is absorbed;
[0052] like Figure 8 As shown, when the voltage comparison circuit 30 starts to generate a voltage maximum change from 0 to a high level, the change information is transmitted to the delay circuit 40, and the delay circuit 40 will follow the predetermined time 100 ms, the delay circuit. 40 Start generation of voltage jump, becoming the high level "1" to a low level "0", and the control relay J1 is disconnected;
[0053] AC contactor stops working:
[0054] When the AC input voltage disappears, the second DC voltage V2 DC low pressure disappears into zero volts, and the AC contactor is broken down due to no voltage supply.
[0055] According to the above embodiment, the present invention has changed the same type of energy-saving product to use AC contactor to assist alternative to normal closed contact, occupying an alternating contactor to assist normally closed contacts, can only be used within a particular range, such as by auxiliary normally closed contact Mechanical delay modification, allowing the auxiliary normally closed point to store a certain separation distance to ensure that the interrupter's auxiliary normally closed contact time is greater than the time required for the contactor main contact, and the circuit itself has control. Timing circuits, no longer rely on the contact loop using the product outside, can independently complete the activation of the actuatory voltage to the AC contactor.
[0056] Further, the present invention provides a short-time absorption voltage to the AC contactor with a DC high voltage, providing a flow low voltage to the AC contactor, and holds the AC contactor after holding the sustain, all parts of the product participating in the work After the AC contactor is in standby, there is no consumption, and the working current after using the product is reduced by 98%, and the energy saving effect is remarkable;
[0057] Moreover, the startup voltage circuit has a current limiting protection of the resistance and capacitance. The resistance in the loop will function as a current limiting protection. The charging characteristics of the circuit are utilized in the loop, providing the required large current when the AC contactor is absorbed; After the contactor is bonded, the startup voltage loop is at a small current under the resistance limit, and the contact loop control the start relay is separated by the small current. The contact does not heat, the contact, the contact is not injured The service life of the relay is guaranteed.
[0058] Based on the above, the present embodiment passes the configuration of the circuit, in the actual use, without changing the original AC contact device structure, the alternating current conversion distribution circuit will be converted by the power conversion distribution circuit. The first DC voltage and the second DC voltage are delivered to the alternating contactor by high voltage DC circuit and low voltage DC circuit, providing a short-time absorption voltage to the AC contactor with a DC high voltage, and is in an AC contactor Providing a direct low voltage maintaining the AC contactor continues to be suction, and there is a current limiting and current start, thereby causing its current loss to 98%, no noise generation, and the coil and core generate heat are 2% of the original product, greatly improved Energy-saving effect does not occupy the auxiliary contacts of the AC contactor, avoiding the change of the alternative contactor structure, greatly reduces production cost, which makes it industrially produced, which is worth promoting.
[0059] It will be noted in that it is intended to be the preferred embodiment of the present invention as described above, and is not intended to limit the invention, although the foregoing examples have been described in detail, and those skilled in the art will still The technical solution described in the foregoing embodiments may be modified, or some technical features are equivalent to the equivalent replacement, and any modification, equivalent replacement, improvement, etc. according to the spirit and principles of the present invention should be included. The invention is within the scope of the invention.
