Electrodeless power control circuit

Abstract

The utility model discloses a stepless power control circuit, comprising a preceding stage commercial power voltage phase detection circuit module used for carrying out phase detection on commercial power voltage of each frequency system and providing a time reference for accurate power control; the electrodeless power control circuit module is used for realizing driving output of power and continuous, smooth and high-precision adjustment control of the power; the light control circuit module is used for controlling on and off of a light power supply; and the temperature control circuit module is used for controlling on and off of a power supply of the heater. According to the utility model, simple opening and closing control can be carried out on a running equipment power supply, continuous, smooth and high-precision stepless power control can also be carried out on power output by the power supply through a commercial power voltage phase detection technology, the loss of electric power energy is greatly reduced, environmental and noise pollution is reduced, and the service life of the power supply is prolonged. And meanwhile, the use value and the user experience of the equipment are greatly improved.

Description

Technical Field

[0001] This disclosure relates to the field of power control circuit technology, and in particular to a stepless power control circuit. Background Technology

[0002] Traditional power control circuits can perform simple power-on and power-off control of electrical equipment such as motors, lights, and heaters, and have advantages such as high reliability, fast response, and simple maintenance. However, when it is necessary to perform precise control of the operating power of the above-mentioned equipment, especially the operating energy consumption and noise, traditional power control circuits cannot meet the requirements. This not only leads to many problems such as high power consumption, serious environmental pollution, and high operating costs, but also causes noise pollution due to excessive noise generated during operation, which seriously affects the user experience. Utility Model Content

[0003] This disclosure provides a stepless power control circuit to solve one of the technical problems recognized by the inventors.

[0004] This disclosure provides a stepless power control circuit, including a front-end mains voltage phase detection circuit module for detecting the phase of mains voltages of various frequencies and providing a time reference for precise power control; a stepless power control circuit module for driving power output and continuously, smoothly and with high precision adjusting and controlling the power; a lighting control circuit module for controlling the on and off of the lighting power supply; and a temperature control circuit module for controlling the on and off of the heater power supply.

[0005] Preferably, the front-end mains voltage phase detection circuit module includes capacitors C1, C2, C3, and C4; diodes D1, D2, D3, D4, D5, and D10; a relay RELAY5; resistors R1, R2, and R3; and an optocoupler U1. The two ends of capacitor C2 are connected to the mains input terminal. Capacitors C1 and C3 are connected in series and then in parallel with capacitor C2. One end of capacitor C1 is connected to one end of relay RELAY5. The other end of relay RELAY5 is connected to the positive terminal of diode D1 and the negative terminal of diode D2. The negative terminal of diode D1 is connected in series with resistors R1 and R2 and the first pin of optocoupler U1. The second pin of optocoupler U1 is connected to resistor R3. One end of resistor R3 is connected to the positive terminals of diodes D2 and D5. The negative terminal of diode D5 is connected to the positive terminal of diode D4. The negative terminal of diode D4 is connected between diode D1 and resistor R1. The two ends of diode D3 are connected to the first and second pins of optocoupler U1, respectively. Diode D10 is connected to relay RELAY5.

[0006] Preferably, the stepless power control circuit module includes a first stepless power control circuit module and a second stepless power control circuit module.

[0007] Preferably, the first stepless power control circuit module includes a MOSFET U2, resistors R5, R8, R10, a thyristor Q1, and a transistor Q4. One end of the MOSFET U2 is connected to pins 12 and 34 of connector P2, and the other end is connected to both ends of the thyristor Q1. Resistor R5 is placed between the MOSFET U2 and the thyristor Q1. The collector of the transistor Q4 is connected to pin 43 of connector P1. Resistor R10 is connected between the base and emitter of the transistor Q4. Resistor R8 is connected to the base of the transistor Q4.

[0008] The second-channel stepless power control circuit module includes a MOSFET U3, resistors R7, R12, R14, a thyristor Q2, and a transistor Q6. One end of the MOSFET U3 is connected to pins 56 and 78 of connector P2, and the other end is connected to both ends of the thyristor Q2. Resistor R7 is placed between the MOSFET U3 and the thyristor Q2. The collector of the transistor Q6 is connected to pin 87 of connector P1. Resistor R14 is connected between the base and emitter of the transistor Q6, and resistor R12 is connected to the base of the transistor Q6.

[0009] Preferably, the lighting control circuit module includes a first lighting control circuit module and a second lighting control circuit module.

[0010] Preferably, the first lighting control circuit module includes a resistor R4, a transistor Q3, a relay RELAY1, and a diode D6. The base of the transistor Q3 is connected to the resistor R4, the collector of the transistor Q3 is connected to the LIGHT1 pin of the connector P1, the relay RELAY1 is connected to the LIGHT1 pin of the connector P2, and the diode D6 is connected in parallel to one end of the relay RELAY1.

[0011] The second lighting control circuit module includes a resistor R9, a transistor Q5, a relay RELAY2, and a diode D7. The base of the transistor Q5 is connected to the resistor R9, the collector of the transistor Q5 is connected to the LIGHT2 pin of the connector P1, the relay RELAY2 is connected to the LIGHT2 pin of the connector P2, and the diode D7 is connected in parallel to one end of the relay RELAY2.

[0012] Preferably, the temperature control circuit module includes a first temperature control circuit module and a second temperature control circuit module.

[0013] Preferably, the first temperature control circuit module includes a resistor R16, a transistor Q7, a relay RELAY3, and a diode D8. The base of the transistor Q7 is connected to the resistor R16, the collector of the transistor Q7 is connected to the TEMP1 pin of the connector P1, the relay RELAY3 is connected to the TEMP1 pin of the connector P2, and the diode D8 is connected in parallel to one end of the relay RELAY3.

[0014] The second temperature control circuit module includes a resistor R18, a transistor Q9, a relay RELAY4, and a diode D9. The base of the transistor Q9 is connected to the resistor R18, the collector of the transistor Q9 is connected to the TEMP2 pin of the connector P1, the relay RELAY4 is connected to the TEMP2 pin of the connector P2, and the diode D9 is connected in parallel to one end of the relay RELAY4.

[0015] The main beneficial effects of this disclosure are as follows: This utility model can not only perform simple on / off control of the power supply of the operating equipment, but also achieve continuous, smooth, and high-precision stepless power control of the power output through mains voltage phase detection technology, which greatly reduces the loss of electrical energy, reduces environmental and noise pollution, and at the same time greatly improves the use value of the equipment and the user experience.

[0016] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a stepless power control circuit according to an embodiment of the present disclosure;

[0019] Figure 2 This is a circuit diagram of the front-end mains voltage phase detection circuit module according to an embodiment of the present disclosure;

[0020] Figure 3 This is a partially enlarged schematic diagram of the stepless power control circuit module in the embodiments of this disclosure. Figure 1 ;

[0021] Figure 4 This is a partially enlarged schematic diagram of the stepless power control circuit module in the embodiments of this disclosure. Figure 2 ;

[0022] Figure 5 This is a schematic diagram of the lighting control circuit module in an embodiment of this disclosure;

[0023] Figure 6 This is a schematic diagram of the temperature control circuit module in an embodiment of this disclosure;

[0024] Icons: 100 - Pre-amplifier mains voltage phase detection circuit module; 200 - Stepless power control circuit module; 300 - Lighting control circuit module; 400 - Temperature control circuit module. Detailed Implementation

[0025] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.

[0026] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0027] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0029] Example

[0030] like Figure 1-6As shown, this embodiment provides a stepless power control circuit, including a front-end mains voltage phase detection circuit module 100, used to detect the phase of mains voltage of various frequency systems and provide a time reference for precise power control; a stepless power control circuit module 200, used to realize the power drive output and the continuous, smooth and high-precision adjustment control of the power; a lighting control circuit module 300, used to realize the on and off control of the lighting power supply; and a temperature control circuit module 400, used to realize the on and off control of the heater power supply.

[0031] Specifically, the front-end mains voltage phase detection circuit module 100 includes capacitors C1, C2, C3, and C4; diodes D1, D2, D3, D4, D5, and D10; a relay RELAY5; resistors R1, R2, and R3; and an optocoupler U1. The two ends of capacitor C2 are connected to the mains input terminal. Capacitors C1 and C3 are connected in series and then in parallel with capacitor C2. One end of capacitor C1 is connected to one end of relay RELAY5. The other end of relay RELAY5 is connected to the positive terminal of diode D1 and the negative terminal of diode D2. The negative terminal of diode D1 is connected in series with resistors R1 and R2 and the first pin of optocoupler U1. The second pin of optocoupler U1 is connected to resistor R3. One end of resistor R3 is connected to the positive terminals of diodes D2 and D5. The negative terminal of diode D5 is connected to the positive terminal of diode D4. The negative terminal of diode D4 is connected between diode D1 and resistor R1. The two ends of diode D3 are connected to the first and second pins of optocoupler U1, respectively. Diode D10 is connected to relay RELAY5. Capacitor C2 is used to suppress common-mode interference, while capacitors C1 and C3 are used to suppress differential-mode interference. When the mains voltage is applied across capacitor C2 and a low level is applied to pin 5 of relay RELAY5, relay RELAY5 will switch from its normally open state to its normally closed state. The mains voltage will then pass through a bridge rectifier circuit composed of diodes D1, D2, D4, and D5. After rectification, the current flowing into optocoupler U1 will always flow from pin 1 to pin 2 of optocoupler U1. Resistors R1 and R3 are power resistors. Resistors are used to limit the current in the circuit, ensuring that the current flowing into optocoupler U1 does not exceed its rated value. Zener diode D3 limits the voltage across resistor R2 and optocoupler U1 to a maximum of +3.3V. The maximum circuit current is calculated using the formula: I = (1.414 * Uin - 3.3) / (68 * 2 * 1000 + 680), where Uin represents the effective value of the input AC voltage. When Uin = AC 220V, the maximum circuit current calculated using the formula is I = 2.25mA. Since the AC voltage is a standard sine wave with a continuously variable amplitude from 0V to its extreme value but alternating current direction, when the AC voltage is 0V, the circuit current is also 0mA. Because optocoupler U1 cannot meet its rated operating current, it is internally disconnected, and pin 4 of optocoupler U1 ultimately exhibits a high level, i.e., +3.3V. When the mains voltage gradually increases and reaches the rated operating current of optocoupler U1, optocoupler U1 will change from an open state to a closed state. At this time, pin 4 of optocoupler U1 will be at a low level, i.e., 0V.Therefore, when the mains voltage crosses the zero point, the voltage level at pin 4 of optocoupler U1 will switch between 0V and +3.3V. This allows for real-time detection of changes in the mains voltage phase, providing a time reference for subsequent stepless power control circuits.

[0032] Specifically, the stepless power control circuit module 200 includes a first stepless power control circuit module 200 and a second stepless power control circuit module 200.

[0033] The first stepless power control circuit module 200 includes a MOSFET U2, resistors R5, R8, and R10, a thyristor Q1, and a transistor Q4. One end of the MOSFET U2 is connected to pins 12 and 34 of connector P2, and the other end is connected to both ends of the thyristor Q1. Resistor R5 is placed between the MOSFET U2 and the thyristor Q1. The collector of the transistor Q4 is connected to pin 43 of connector P1. Resistor R10 is connected between the base and emitter of the transistor Q4, and resistor R8 is connected to the base of the transistor Q4.

[0034] The second-channel stepless power control circuit module 200 includes a MOSFET U3, resistors R7, R12, R14, a thyristor Q2, and a transistor Q6. One end of the MOSFET U3 is connected to pins 56 and 78 of connector P2, and the other end is connected to both ends of the thyristor Q2. Resistor R7 is placed between the MOSFET U3 and the thyristor Q2. The collector of the transistor Q6 is connected to pin 87 of connector P1. Resistor R14 is connected between the base and emitter of the transistor Q6, and resistor R12 is connected to the base of the transistor Q6.

[0035] Taking the first-channel stepless power control circuit module 200 as an example, when the input voltage of resistor R8, i.e., FAN_CTRL1, is high at +3.3V, transistor Q4 will become saturated. At this time, pins 1 and 2 of MOSFET U2 will conduct, and pins 4 and 6 of MOSFET U2 will also form a circuit due to the former's conduction. Resistor R5 in the circuit provides drive current to the control stage of thyristor Q1. Finally, the cathode and anode of thyristor Q1 form a circuit to drive external power devices. When the input voltage of resistor R8, i.e., FAN_CTRL1, is low at 0V, transistor Q4 will become cut off. At this time, pins 1 and 2 of MOSFET U2 will be disconnected, and pins 4 and 6 of MOSFET U2 will not form a circuit due to the former's disconnection. At this time, resistor R5 cannot provide drive current to the control stage of thyristor Q1, and the cathode and anode of thyristor Q1 cannot form a circuit. Finally, the current driving the peripheral device will become 0mA. Therefore, the voltage level of the input terminal of resistor R8, i.e., FAN_CTRL1, can be quickly switched by a predetermined value to achieve accurate control of the circuit's operating time, ultimately realizing continuous, smooth, and highly precise stepless power control. Similarly, the working principle and implementation method of the second-channel stepless power control circuit module 200 are the same as the first channel, and will be described in detail here.

[0036] Specifically, the lighting control circuit module 300 includes a first lighting control circuit module 300 and a second lighting control circuit module 300.

[0037] The first lighting control circuit module 300 includes a resistor R4, a transistor Q3, a relay RELAY1, and a diode D6. The base of the transistor Q3 is connected to the resistor R4, the collector of the transistor Q3 is connected to the LIGHT1 pin of the connector P1, the relay RELAY1 is connected to the LIGHT1 pin of the connector P2, and the diode D6 is connected in parallel to one end of the relay RELAY1.

[0038] The second lighting control circuit module 300 includes a resistor R9, a transistor Q5, a relay RELAY2, and a diode D7. The base of the transistor Q5 is connected to the resistor R9, the collector of the transistor Q5 is connected to the LIGHT2 pin of the connector P1, the relay RELAY2 is connected to the LIGHT2 pin of the connector P2, and the diode D7 is connected in parallel to one end of the relay RELAY2.

[0039] Taking the first lighting control circuit module 300 as an example, when the input voltage of resistor R4, i.e., LIGHT_RELAY1, is high at +3.3V, transistor Q3 will become saturated, and pins 4 and 5 of relay RELAY1 will form a current loop, causing the relay to engage internally. Relay RELAY1 will then become normally closed, providing power to the lights. When the input voltage of resistor R4, i.e., LIGHT_RELAY1, is low at 0V, transistor Q3 will become cut off, pins 4 and 5 of relay RELAY1 will not form a current loop, relay RELAY1 will disengage internally, and relay RELAY1 will become normally open, no longer providing power to the lights. Similarly, the second lighting control circuit module 300 operates on the same principle and is implemented in the same way as the first lighting control circuit module 300, and will not be described in detail here.

[0040] Specifically, the temperature control circuit module 400 includes a first temperature control circuit module 400 and a second temperature control circuit module 400.

[0041] The first temperature control circuit module 400 includes a resistor R16, a transistor Q7, a relay RELAY3, and a diode D8. The base of the transistor Q7 is connected to the resistor R16, the collector of the transistor Q7 is connected to the TEMP1 pin of the connector P1, the relay RELAY3 is connected to the TEMP1 pin of the connector P2, and the diode D8 is connected in parallel to one end of the relay RELAY3.

[0042] The second temperature control circuit module 400 includes a resistor R18, a transistor Q9, a relay RELAY4, and a diode D9. The base of the transistor Q9 is connected to the resistor R18, the collector of the transistor Q9 is connected to the TEMP2 pin of the connector P1, the relay RELAY4 is connected to the TEMP2 pin of the connector P2, and the diode D9 is connected in parallel to one end of the relay RELAY4.

[0043] Taking the first temperature control circuit module 400 as an example, when the input voltage of resistor R16, i.e., TEMP_RELAY1, is high at +3.3V, transistor Q7 will become saturated, and pins 4 and 5 of relay RELAY3 will form a current loop, causing relay RELAY3 to be internally energized and normally closed, thus providing power to the heater. When the input voltage of resistor R16, i.e., TEMP_RELAY1, is low at 0V, transistor Q7 will become cut off, and pins 4 and 5 of relay RELAY3 will not form a current loop, causing relay RELAY3 to be internally open and normally open, no longer providing power to the heater. Similarly, the second temperature control circuit module 400 operates on the same principle and in the same way as the first one.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure.

Claims

1. An endless power control circuit, characterized by comprising: It includes: The front stage of the mains voltage phase detection circuit module is used for phase detection of each frequency system mains voltage, and provides accurate power control time reference; The endless power control circuit module is used for realizing the driving output of power and the continuous, smooth and high-precision adjustment control of power; The light control circuit module realizes the opening and closing control of the light power supply; The temperature control circuit module realizes the opening and closing control of the heater power supply.

2. A rheostat power control circuit according to claim 1, wherein The front stage of the mains voltage phase detection circuit module includes capacitors C1, C2, C3, C4, diodes D1, D2, D3, D4, D5, D10, a relay RELAY5, resistors R1, R2, R3 and an optocoupler U1, two ends of the capacitor C2 are connected with the input end of the mains, the capacitors C1 and C3 are connected in series and connected with the capacitor C2 in parallel, one end of the capacitor C1 is connected with one end of the relay RELAY5, the other end of the relay RELAY5 is connected with the positive end of the diode D1 and the negative end of the diode D2, the negative end of the diode D1 is connected with the resistor R1, the resistor R2 and the first pin of the optocoupler U1 in sequence, the second pin of the optocoupler U1 is connected with the resistor R3, one end of the resistor R3 is connected with the positive end of the diode D2 and the positive end of the diode D5, the negative end of the diode D5 is connected with the positive end of the diode D4, the negative end of the diode D4 is connected between the diode D1 and the resistor R1, the diode D3 is connected with the first and second pins of the optocoupler U1, and the diode D10 is connected with the relay RELAY5.

3. A rheostatic power control circuit according to claim 1, characterized in that The endless power control circuit module includes a first endless power control circuit module and a second endless power control circuit module.

4. A rheostat power control circuit according to claim 3, wherein The first endless power control circuit module includes a mos tube U2, resistors R5, R8, R10, a thyristor Q1 and a transistor Q4, one end of the mos tube U2 is connected with the 12th and 34th pins of the connector P2, the other end is connected with both ends of the thyristor Q1, the resistor R5 is arranged between the mos tube U2 and the thyristor Q1, the collector of the transistor Q4 is connected with the 43rd pin of the connector P1, the resistor R10 is connected between the base and the emitter of the transistor Q4, and the base of the transistor Q4 is connected with the resistor R8; The second endless power control circuit module includes a mos tube U3, resistors R7, R12, R14, a thyristor Q2 and a transistor Q6, one end of the mos tube U3 is connected with the 56th and 78th pins of the connector P2, the other end is connected with both ends of the thyristor Q2, the resistor R7 is arranged between the mos tube U3 and the thyristor Q2, the collector of the transistor Q6 is connected with the 87th pin of the connector P1, the resistor R14 is connected between the base and the emitter of the transistor Q6, and the base of the transistor Q6 is connected with the resistor R12.

5. A rheostat power control circuit according to claim 4, wherein The light control circuit module includes a first light control circuit module and a second light control circuit module.

6. A rheostat power control circuit according to claim 5, wherein The first light control circuit module comprises a resistor R4, a triode Q3, a relay RELAY1 and a diode D6, the base of the triode Q3 is connected with the resistor R4, the collector of the triode Q3 is connected with the LIGHT1 pin of the connector P1, the relay RELAY1 is connected with the LIGHT1 pin of the connector P2, and the diode D6 is connected with one end of the relay RELAY1 in parallel. The second light control circuit module comprises a resistor R9, a triode Q5, a relay RELAY2 and a diode D7, the base of the triode Q5 is connected with the resistor R9, the collector of the triode Q5 is connected with the LIGHT2 pin of the connector P1, the relay RELAY2 is connected with the LIGHT2 pin of the connector P2, and the diode D7 is connected with one end of the relay RELAY2 in parallel.

7. A rheostatic power control circuit according to claim 4, characterized in that The temperature control circuit module comprises a first temperature control circuit module and a second temperature control circuit module.

8. A rheostatic power control circuit according to claim 7, characterized in that The first temperature control circuit module comprises a resistor R16, a triode Q7, a relay RELAY3 and a diode D8, the base of the triode Q7 is connected with the resistor R16, the collector of the triode Q7 is connected with the TEMP1 pin of the connector P1, the relay RELAY3 is connected with the TEMP1 pin of the connector P2, and the diode D8 is connected with one end of the relay RELAY3 in parallel. The second temperature control circuit module comprises a resistor R18, a triode Q9, a relay RELAY4 and a diode D9, the base of the triode Q9 is connected with the resistor R18, the collector of the triode Q9 is connected with the TEMP2 pin of the connector P1, the relay RELAY4 is connected with the TEMP2 pin of the connector P2, and the diode D9 is connected with one end of the relay RELAY4 in parallel.

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