CN2195827Y

CN2195827Y - Speed regulator for electronic hanging fan

Info

Publication number: CN2195827Y
Application number: CN 94242180
Authority: CN
Inventors: 张志文
Original assignee: Zhengren Electronic Tech Development Co Wu County Suzhou City
Current assignee: Zhengren Electronic Tech Development Co Wu County Suzhou City
Priority date: 1994-07-01
Filing date: 1994-07-01
Publication date: 1995-04-26
Anticipated expiration: 2004-07-01

Abstract

The utility model relates to a speed regulator for an electronic ceiling fan, which is characterized in that the utility model comprises a direct current supply power source, an alternate current zero-crossing detecting circuit, an oscillating circuit, and an output driving circuit. The direct current supply power source is divided into two groups which respectively work at a thyristor SCR1 is closed and conducted. The utility model makes use of the inertia of the electric fan, and can continuously adjust the rotary speed of the electromotor of the fan. The speed regulator for an electronic ceiling fan has no mechanical contacts, and the service life is prolonged. The speed regulator for an electronic ceiling fan can supply power to an electronic control circuit continuously to ensure the normal working of an electronic circuit.

Description

Speed regulator for electronic hanging fan

The utility model relates to a kind of hanging fan governor.

Fan governor is to be used for fan is carried out the electric device of speed regulation.Use at present hanging fan governor more widely is an inductance buck speed regulator, for the different ceiling fan of specification, and the necessary different speed regulator of adapted, its power consumption is big, and contact is easy to damage.

The purpose of this utility model is to provide a kind of all-electronin hanging fan governor, utilizes the inertia of electric fan, reaches the purpose of fan motor speed governing by adjusting silicon controlled ON time.

The technical solution of the utility model is: it comprises dc power supply, ac zero-crossing detection circuit, oscillating circuit and output driving circuit; In the described dc power supply, seal in transformer B in the controllable silicon loop, the former end bay of transformer B is connected to the bidirectional triode thyristor SCR2 that is used for clamp, the other end cross-over connection of its control utmost point and controllable silicon SCR 2 has resistance R 12, the bridge rectifier that the secondary cross-over connection of transformer B is made up of diode D5～D8, the output cross-over connection of this bridge rectifier has the direct current regulation circuit that is composed in parallel by voltage stabilizing didoe DW and filter capacitor C1, the power supply of the follow-up electronic circuit of output termination of this direct current regulation circuit and ground; Current-limiting resistance R1, halfwave rectifier diode D11 series connection back one termination AC power L end, a voltage stabilizing input of the described direct current regulation circuit of another termination, the rectification output end of the bridge rectifier that another voltage stabilizing input termination of this direct current regulation circuit is made up of D1～D4, the rectification input cross-over connection of the bridge rectifier of described D1～D4 composition is in an end of controllable silicon SCR 2 with between the alternating current seedbed N that motor M connect; The rectification output end cross-over connection of the bridge rectifier that described D1～D4 forms is useful on the controllable silicon SCR 1 that output drives, and the control utmost point of controllable silicon SCR 1 connects the trigger impulse of oscillating circuit and ac zero-crossing detection circuit generation.

The utility model compared with prior art has following advantage:

(1). dc power supply has two-way, when controllable silicon SCR 1 turn-on and turn-off, use respectively, when having solved the full conducting of controllable silicon SCR 1 (during the ceiling-fan motor full-speed operation), the electronic circuit of this device does not have the problem of DC power supply, makes circuit can obtain more stable dc supply.

(2). the all-electronin speed governing, there is not mechanical contact, greatly prolong useful life.

The utility model will be further described below in conjunction with drawings and Examples:

Accompanying drawing is circuit theory diagrams of the present utility model;

Embodiment: referring to accompanying drawing, it comprises dc power supply, ac zero-crossing detection circuit, oscillating circuit and output driving circuit; In the described dc power supply, the former end bay of transformer B is connected to the bidirectional triode thyristor SCR2 that is used for clamp, the other end cross-over connection of its control utmost point and controllable silicon SCR 2 has resistance R 12, the bridge rectifier that the secondary cross-over connection of transformer B is made up of diode D5～D8, the output cross-over connection of this bridge rectifier has the direct current regulation circuit that is composed in parallel by voltage stabilizing didoe DW and filter capacitor C1, the power supply of the follow-up electronic circuit of output termination of this direct current regulation circuit and ground; Current-limiting resistance R1, halfwave rectifier diode D11 series connection back one termination AC power L end, a voltage stabilizing input of the described direct current regulation circuit of another termination, the rectification output end of the bridge rectifier that another voltage stabilizing input termination of this direct current regulation circuit is made up of D1～D4, the rectification input cross-over connection of the bridge rectifier of described D1～D4 composition is in an end of controllable silicon SCR 2 with between the alternating current seedbed N that motor M connect; The rectification output end cross-over connection of the bridge rectifier that described D1～D4 forms is useful on the controllable silicon SCR 1 that output drives, and the control utmost point of controllable silicon SCR 1 connects the trigger impulse of oscillating circuit and ac zero-crossing detection circuit generation.Ac zero-crossing detection circuit is by divider resistance R18, R9, triode T1 forms, the base stage of T1 connects an output of the bridge rectifier of being made up of D1～D4 through divider resistance R18 and R9, the emitter of T1 connects another output of this bridge rectifier, the collector electrode of T1 is as the level input of the output termination NAND gate IC1 of ac zero-crossing detection circuit, the oscillator signal output of another input termination oscillating circuit of NAND gate IC1, the power amplification circuit that the output termination of IC1 is made up of triode T2, the control utmost point of the output termination controllable silicon SCR 1 of this power amplification circuit.The utility model is connected the back cross-over connection in AC power L, N two ends with fan electromotor M.DC power-supply circuit is made up of two groups of separate DC power supply, wherein be made up of R1, R2, halfwave rectifier diode D11, DW, C1 for one group, another group is made up of bidirectional triode thyristor SCR2, resistance R 12, transformer B, bridge rectifier diode D5～D8, DW, C1.When controllable silicon SCR 1 is operated in off state, grid ac voltage substantially all is added in A, B two ends, electric current forms the loop by the diode D4 in K switch, R1, R2, D11, DW, C1, the bridge rectifier, carry out voltage stabilizing and filtering by DW, C1, output DC source voltage is given subsequent conditioning circuit.When controllable silicon SCR 1 is operated in conducting state, at the positive half cycle of alternating current, electric current forms the loop by A, SCR2, D2, SCR1, D4, B, at the alternating current negative half period, electric current forms the loop by B, D3, SCR1, D1, SCR2, A, the voltage that is added in speed regulator A, B two ends this moment is zero substantially, so can't work through first group of power supply of R1, R2, D11 formation.But because of the former limit that is connected on the transformer B in controllable silicon SCR 1 loop has electric current to flow through, secondary at B produces corresponding induced potential, this electromotive force also can obtain identical direct-current working volts, with the operate as normal of holding circuit after rectification, voltage stabilizing and the filtering of elements such as D5～D8, DW, C1.Here bidirectional triode thyristor SCR2 plays clamping action and shunting action, and R12 is the triggering resistance of controllable silicon SCR 2, and when making the SCR1 conducting, the primary voltage nip bit of SCR2 is in one volt.Like this, no matter speed regulator is operated in any state, and control circuit of the present utility model all can obtain stable direct-current working volts, simultaneously because of same voltage-stabiliser tube DW of these two groups of power sharings and filter capacitor C1, makes the direct-current working volts quite stable.Because the reverse blocking voltage of D11 and rectifier diode D5～D8, two groups of power supplys are independent of each other.In circuit, insert LED and be used for the power supply indication.Form a fixing multivibrator circuit cycle of oscillation by R11, D12, D13, W, NAND gate IC2, C2, NAND gate IC3, regulator potentiometer W can change the duty ratio of oscillator pulses, through after the level NAND gate IC1 and amplifying triode T2, the control that is added in controllable silicon SCR 1 is extremely gone up, with the control silicon controlled turn-on and turn-off time, and then the rotating speed of control fan.The zero cross detection circuit of forming alternating current by D1～D4, R18, R9, T2, when the alternating current zero passage,, open NAND gate IC1 at direct impulse of collector electrode generation of triode T2, the signal that oscillator is produced be able to by, thereby make controllable silicon SCR 1 in the zero crossing conducting.After controllable silicon SCR 1 conducting, T2 is a cut-off state, and the collector electrode of T2 maintains high level always, and NAND gate IC1 is in opening, and when oscillator signal was low level, controllable silicon SCR 1 was just turn-offed.

Claims

1, a kind of all-electronin hanging fan governor, it is characterized in that: it comprises dc power supply, ac zero-crossing detection circuit, oscillating circuit and output driving circuit; In the described dc power supply, seal in transformer B in the controllable silicon loop, the former end bay of transformer B is connected to the bidirectional triode thyristor SCR2 that is used for clamp, the other end cross-over connection of its control utmost point and controllable silicon SCR 2 has resistance R 12, the bridge rectifier that the secondary cross-over connection of transformer B is made up of diode D5～D8, the output cross-over connection of this bridge rectifier has the direct current regulation circuit that is composed in parallel by voltage stabilizing didoe DW and filter capacitor C1, the power supply of the follow-up electronic circuit of output termination of this direct current regulation circuit and ground; Current-limiting resistance R1, halfwave rectifier diode D11 series connection back one termination AC power L end, a voltage stabilizing input of the described direct current regulation circuit of another termination, the rectification output end of the bridge rectifier that another voltage stabilizing input termination of this direct current regulation circuit is made up of D1～D4, the rectification input cross-over connection of the bridge rectifier of described D1～D4 composition is in an end of controllable silicon SCR 2 with between the alternating current seedbed N that motor M connect; The rectification output end cross-over connection of the bridge rectifier that described D1～D4 forms is useful on the controllable silicon SCR 1 that output voltage is regulated, and the control utmost point of controllable silicon SCR 1 connects the trigger impulse of oscillating circuit and ac zero-crossing detection circuit generation.

2, all-electronin hanging fan governor according to claim 1, it is characterized in that: ac zero-crossing detection circuit is made up of divider resistance R18 and triode T1, the base stage of T1 connects an output of the bridge rectifier of being made up of D1～D4 through divider resistance R18, the emitter of T1 connects another output of this bridge rectifier, the collector electrode of T1 is as the level input of the output termination NAND gate IC1 of ac zero-crossing detection circuit, the oscillator signal output of another input termination oscillating circuit of NAND gate IC1, the power amplification circuit that the output termination of IC1 is made up of triode T2, the control utmost point of the output termination controllable silicon SCR 1 of this power amplification circuit.