CN213125884U - Single-phase AC speed-regulating current controller without electrolytic capacitor - Google Patents

Abstract

The utility model discloses a no electrolytic capacitor single-phase AC speed governing current controlling means, including rectifier circuit, a termination resistance R1, resistance R2 and resistance R3 of rectifier circuit connect on the three-phase line, another termination inductance filter circuit of rectifier circuit, and silicon controlled rectifier voltage regulating circuit and H bridge inverter circuit are connected respectively to inductance filter circuit, and H bridge inverter circuit connects on the motor. This no electrolytic capacitor single phase AC speed governing current control device, inductance filter circuit does not have electrolytic capacitor, the controller is longe-lived, but its motor speed of adopting the silicon controlled rectifier speed governing is continuous to be adjusted, three-phase line that meets under with the total power among the AC motor of control meets with AC contactor KM, carry out voltage detection and current detection respectively between rectifier circuit and the H bridge inverter circuit, H bridge inverter circuit still carries out temperature detection, H bridge inverter circuit output current to AC motor on, the silicon controlled rectifier pressure regulating speed governing realizes the variable voltage speed governing through the angle of flow of adjusting the silicon controlled rectifier.

Description

Single-phase AC speed-regulating current controller without electrolytic capacitor

Technical Field

The utility model relates to the technical field of motors, specifically be no electrolytic capacitor single-phase alternating current speed governing current control device.

Background

The low-power split indoor fan is a PG speed-regulating plastic-sealed motor which is a unidirectional asynchronous capacitor running motor at present. In order to meet the normal operation of an air conditioner and achieve the balance of refrigeration and heating capacities, the rotating speed of an indoor fan must be guaranteed to meet the requirements of a system, and the rotating speed is kept stable, so that the rotating speed of the fan is regulated by adopting a silicon controlled voltage and speed regulating method, the variable voltage speed regulation is realized by regulating the conduction angle of the silicon controlled, and the control scheme has the defects that the single-phase alternating current variable frequency speed regulation is adopted: 1. the motor current is increased by 2, the noise is increased by 3, the adjusting range is small, and the control scheme has the following defects: 1. the electrolytic capacitor influences the service life 2. the power supply harmonic wave of the power grid is large, and the power factor is lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a no electrolytic capacitor single-phase alternating current speed governing current control device has no electrolytic capacitor, and the controller is longe-lived, the noise is low, power factor is high and not through voltage control, does not increase the motor current, prevents the advantage that the electric current burns out, has solved the problem among the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: the electrolytic capacitor-free single-phase alternating current speed regulation current control device comprises a rectifying circuit, wherein one end of the rectifying circuit is connected with a resistor R1, a resistor R2 and a resistor R3 and is connected to a three-phase line, the other end of the rectifying circuit is connected with an inductive filter circuit, the inductive filter circuit is respectively connected with a silicon controlled voltage regulation circuit and an H-bridge inverter circuit, and the H-bridge inverter circuit is connected to a motor.

Preferably, the inductance filter circuit 2 comprises an inductance L1 and a resistance R4, the inductance L1 and the resistance R4 are connected in series, one end of the inductance L1 is connected to the rectifier circuit 1, and the other end of the inductance L1 is connected to the thyristor voltage regulator circuit 3.

Preferably, the thyristor voltage regulating circuit comprises a photocoupler IC6, a voltage stabilizing diode Z1, a bidirectional thyristor BT1 and an interface CN1, a terminal angle 1 of the interface CN1 is connected with a capacitor C3 and a terminal angle 3 in series and is also connected with a diode D7, a super capacitor EC1, a voltage stabilizing diode Z1, a resistor R5 and a capacitor C1 in parallel, a port of the diode is connected with the bidirectional thyristor BT1 and a capacitor C2 in parallel, two ends of the bidirectional thyristor BT1 are respectively connected with the photocoupler IC6 and an inductor L2, the inductor L2 and the resistor R4 are connected with the terminal angle 2 of the interface CN1 in parallel, and the other end of the photocoupler IC6 is connected with a resistor R8 in series and is connected with a rectifying circuit and an inductor filter.

Preferably, the end corner 5 of the interface CN1 is connected to an H-bridge inverter circuit.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the single-phase AC speed-regulating current control device without electrolytic capacitor has SCR speed regulation to change the voltage waveform of motor terminal by changing the conduction angle of SCR, the three-phase line connected with the lower part of the main power supply in the controlled AC motor is connected with an AC contactor KM, the AC contactor KM is connected with a connected fusing core, the other end of the fusing core is connected with a bridge rectifier circuit, voltage detection and current detection are respectively carried out between the rectifier circuit and an H bridge inverter circuit, the H bridge inverter circuit also carries out temperature detection, the H bridge inverter circuit outputs current to the AC motor, the silicon controlled rectifier regulates the voltage and the speed, and the variable voltage and the speed are realized by adjusting the conduction angle of the silicon controlled rectifier.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

In the figure: 1. a rectifying circuit; 2. an inductive filter circuit; 3. a silicon controlled voltage regulating circuit; 4. h bridge inverter circuit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the single-phase ac speed-regulating current control device without electrolytic capacitor includes a rectifier circuit 1, one end of the rectifier circuit 1 is connected to a resistor R1, a resistor R2 and a resistor R3, which are connected to a three-phase line, the other end of the rectifier circuit 1 is connected to an inductive filter circuit 2, the inductive filter circuit 2 is connected to a thyristor voltage-regulating circuit 3 and an H-bridge inverter circuit 4, the H-bridge inverter circuit 4 is connected to a motor, the inductive filter circuit 2 includes an inductor L1 and a resistor R4, the inductor L1 is connected to the resistor R4 in series, one end is connected to the rectifier circuit 1, the other end is connected to the thyristor voltage-regulating circuit 3, and an end corner 5 of an interface CN1 is connected.

The SCR voltage regulator circuit 3 comprises a photoelectric coupler IC6, a voltage stabilizing diode Z1, a bidirectional SCR BT1 and an interface CN1, wherein an end angle 1 of the interface CN1 is connected with a capacitor C3 in series and an end angle 3 in parallel and is also connected with a diode D7, a super capacitor EC1, a voltage stabilizing diode Z1, a resistor R5 and a capacitor C1 in parallel, the port of the bidirectional SCR BT1 and the capacitor C2 are connected in parallel, the two ends of the bidirectional SCR BT1 are respectively connected with a photoelectric coupler IC6 and an inductor L2, the inductor L2 and the resistor R4 are connected with an end angle 2 of the interface CN1 in parallel, the other end of the photoelectric coupler IC6 is connected with a resistor R8 in series and is connected with a rectifying circuit 1 and an inductor filter circuit 2 in parallel and the voltage regulator circuit 3, the inductor filter circuit 2 has no electrolytic capacitor, the service life of the controller is long, the SCR speed regulation is realized by changing the waveform of the voltage of the end voltage of the motor end voltage by changing, the motor speed can be continuously adjusted by adopting silicon controlled rectifier speed regulation, three phase lines connected with a main power supply in a controlled alternating current motor are connected with an alternating current contactor KM, the alternating current contactor KM is connected with a connected fusing core, the other end of the fusing core is connected on a bridge rectifier circuit 1, voltage detection and current detection are respectively carried out between the rectifier circuit 1 and an H bridge inverter circuit 4, the H bridge inverter circuit 4 also carries out temperature detection, and the H bridge inverter circuit 4 outputs current to the alternating current motor.

In summary, the following steps: the single-phase AC speed-regulating current control device without electrolytic capacitor has SCR speed regulation to change the voltage waveform of motor terminal by changing the conduction angle of SCR, therefore, the effective value of the terminal voltage of the motor is changed, the purpose of speed regulation is achieved, the inductive filter circuit 2 has no electrolytic capacitor, the service life of the controller is long, the motor speed can be continuously regulated by adopting the silicon controlled rectifier, a three-phase line connected with the lower part of a main power supply in the controlled alternating current motor is connected with an alternating current contactor KM, the alternating current contactor KM is connected with a connected fusing core, the other end of the fusing core is connected with the bridge rectifier circuit 1, voltage detection and current detection are respectively carried out between the rectifier circuit 1 and the H bridge inverter circuit 4, the H bridge inverter circuit 4 also carries out temperature detection, the H bridge inverter circuit 4 outputs current to the alternating current motor, the silicon controlled rectifier regulates the voltage and the speed, and the variable voltage and the speed regulation.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. Electrolytic capacitor-free single-phase alternating current speed regulation current control device comprises a rectification circuit (1), and is characterized in that: one end of the rectifying circuit (1) is connected with a resistor R1, a resistor R2 and a resistor R3 and is connected with a three-phase line, the other end of the rectifying circuit (1) is connected with an inductive filter circuit (2), the inductive filter circuit (2) is respectively connected with a silicon controlled voltage regulating circuit (3) and an H bridge inverter circuit (4), and the H bridge inverter circuit (4) is connected with a motor.

2. The electrolytic capacitor-free single-phase alternating current speed regulation current control device as claimed in claim 1, wherein the inductance filter circuit (2) comprises an inductance L1 and a resistance R4, the inductance L1 and the resistance R4 are connected in series, one end of the inductance L1 and one end of the resistance R4 are connected to the rectifying circuit (1), and the other end of the inductance L1 and the other end of the resistance R4 are connected to the thyristor voltage regulation circuit (3).

3. The single-phase alternating current speed-regulating current control device without electrolytic capacitor as claimed in claim 1, wherein the thyristor voltage-regulating circuit (3) comprises a photocoupler IC6, a voltage-stabilizing diode Z1, a triac BT1 and an interface CN1, a terminal angle 1 series capacitor C3 and a terminal angle 3 of the interface CN1 are further connected in parallel with a diode D7, a super capacitor EC1, a voltage-stabilizing diode Z1, a resistor R5 and a capacitor C1, the ports of the capacitor C2 and the terminal angle 1 are connected in parallel with the triac BT1, the two ends of the triac BT1 are respectively connected with the photocoupler IC6 and an inductor L2, the inductor L2 and the resistor R4 are connected in parallel with the terminal angle 2 of the interface CN1, and the other end series resistor R8 of the photocoupler IC6 is connected in parallel with the rectifying circuit (1) and the inductor filter circuit (2).

4. The electrolytic capacitor-free single-phase alternating current speed regulation current control device is characterized in that an end corner 5 of the interface CN1 is connected to an H-bridge inverter circuit (4).

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