CN201789422U

CN201789422U - Ultra-wide voltage power supply circuit for soymilk maker

Info

Publication number: CN201789422U
Application number: CN2010202926562U
Authority: CN
Inventors: 杨汉明
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-16
Filing date: 2010-08-16
Publication date: 2011-04-06
Anticipated expiration: 2020-08-16

Abstract

The utility model discloses an ultra-wide voltage power supply circuit for a soymilk maker, which comprises two power supply input ends and a high frequency transformer T1, wherein the two power supply input ends are connected with an alternating current power supply; the other end of a circuit board is connected with a diode D2, an electrolytic capacitor C1 and a resistor R1 so as to form a rectification filter circuit; the high frequency transformer T1 comprises a coil L1, a feedback coil L2 and a secondary coil L3; the alternating current power supply is applied on the coil L1 of the high frequency transformer T1 after being converted to high-voltage direct current through the rectification filter circuit; a R8 and a C10 which are positioned at one end of the feedback coil L2 are connected in parallel, and then are connected with a R7 in series, so that positive voltage is formed at the upper end of the feedback coil L2, and the positive voltage is fed back to a Q2 through a R6 connected with the Q2 after passing through the C10 and the R7; a D6 and a C9 are connected with the other end of the feedback coil L2 in series, and a voltage stabilizing circuit is formed by the D6, the C9, a Z2 and the feedback coil L2; in addition, the secondary coil L3 is connected with a D4 and a C6 in series so as to form the rectification filter circuit and provide a low-voltage direct current supply.

Description

A kind of soy bean milk making machine super wide voltage power circuit

[technical field]

The utility model relates to a kind of switching power circuit, especially a kind of soy bean milk making machine super wide voltage power circuit.

[background technology]

Existing soy bean milk making machine power supply circuit, as shown in Figure 1, all be to use fiery ox transformer, weight and volume is bigger, it is low with conversion efficiency to take up room, the voltage power supply narrow range that is suitable for, because the difference in area, the deviation range of voltage is big, if when operating voltage is lower than 150V, soy bean milk making machine is owing to the influence of transformer just can not be worked, or because of spread of voltage causes the easily appearance of problem such as damage of master control borad components and parts easily, in addition from power consumption, the stand-by power consumption of fiery ox transformer is at 1.6 watts, fire ox transformer is owing to use too much copper cash not only to consume the too much copper product energy, and increased product cost.

[utility model content]

The utility model has the advantages that that a kind of cost is provided is low, the voltage power supply wide ranges, the conversion efficiency height, power consumption is little, and the output voltage deviation is little, the soy bean milk making machine super wide voltage power circuit that cost performance is high.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of soy bean milk making machine super wide voltage power circuit is characterized in that, comprising:

Have two power inputs, be connected with AC power through circuit board, power output end output low-voltage dc power supply is given governor circuit, and another terminating diode D2, the electrochemical capacitor C1 of described circuit board and resistance R 1 are formed current rectifying and wave filtering circuit;

T1 high frequency transformer with coil L1, feedback coil L2 and secondary coil L3, coil L1 are used in AC power after current rectifying and wave filtering circuit converts high voltage direct current to, are added on the coil L1 of T1 high frequency transformer;

Connect with R7 at the R8 and the C10 of feedback coil L2 one end and after connecing, after being used for feedback coil L2 upper end formed positive voltage, behind C10 and R7, the resistance R 6 that connects by Q2 feeds back to Q2 again;

Be serially connected in the D6 and the C9 of the feedback coil L2 other end, it constitutes voltage stabilizing circuit with Z2 and feedback coil L2;

Secondary coil L3 constitutes current rectifying and wave filtering circuit after D4, C6 serial connection, low-voltage dc power supply is provided.

Aforesaid a kind of soy bean milk making machine super wide voltage power circuit also comprises being connected coil L1 one end, the C4 as protection component, R3 and D3.

Aforesaid a kind of soy bean milk making machine super wide voltage power circuit, also comprise be connected the coil L3 other end, as the C7 of protection component.

The beneficial effects of the utility model are:

Power circuit of the present utility model is in light weight, and volume is little, and cost is low, the voltage power supply wide ranges, and the input voltage of energy self adaptation 70V～280V, the conversion efficiency height, stand-by power consumption has only 0.01W, and the output voltage deviation is little, and the deviation of output voltage is not more than 2V.

[description of drawings]

Fig. 1 is existing soymilk grinder control circuit block diagram;

Fig. 2 is the utility model embodiment one circuit theory diagrams;

Fig. 3 is the utility model embodiment two circuit theory diagrams;

Fig. 4 is the block diagram of the utility model soymilk grinder control circuit.

[embodiment]

A kind of soy bean milk making machine super wide voltage power circuit, as shown in Figure 2, be the circuit theory diagrams that the utility model embodiment one adopts the Switching Power Supply of halfwave rectifier, civil power is by the CN1 place of two power input place in circuit plates, form current rectifying and wave filtering circuit through diode D2, electrochemical capacitor C1 and resistance R 1, convert high voltage direct current to, this voltage is added in 1 pin (upper end of coil L1) of T1 high frequency transformer, simultaneously this voltage makes its lightly conducting after R2 and R6 add upper offset to Q2, has electric current to flow through coil L1; The upper end (3 pin of T1 high frequency transformer) of feedback coil L2 forms positive voltage simultaneously, behind this voltage process C10 and the R7, feed back to Q2 by the resistance R 6 that is connected with Q2, make its conducting more, and even saturated, at last with the reducing of feedback current, Q2 withdraws from saturation condition rapidly and ends, so circulation forms vibration, and secondary coil L3 induces required output voltage simultaneously.Be serially connected in the D6 and the C9 of the feedback coil L2 other end, it constitutes voltage stabilizing circuit with Z2 and feedback coil L2, when secondary coil L3 through the D4 rectification, after the voltage of C6 raises, it is lower through the voltage on the C9 negative pole after the D6 rectification simultaneously also to show as feedback coil L2, when this voltage is low to moderate the stationary value of voltage-stabiliser tube Z2, and voltage-stabiliser tube Z2 conducting, make Q2 have base stage to be shorted to ground, turn-off Q2 output voltage is reduced; C4, R3 and D3 as protection component, can play certain protection effect at specified conditions at this circuit; C7 is as the protection component of this circuit, and the deviation of control output voltage is not more than 2V.

Fig. 3 is the circuit theory diagrams that the utility model embodiment two adopts the Switching Power Supply of full-wave rectification, civil power is by the CN1 place of two power input place in circuit plates, current rectifying and wave filtering circuit through diode D2 composition, be directly changed into high voltage direct current then, be added in 1 pin (upper end of coil L1) of T1 high frequency transformer again, the circuit of its back connects identical with embodiment 1, does not repeat them here.

As shown in Figure 4, this power circuit is mainly used on the soy bean milk making machine industry, and applicable input voltage is 70V～280V, and the voltage power supply scope is wide, the output voltage of its Switching Power Supply is not affected because of city's variation of AC voltage, and whole soy bean milk making machine still can be kept operate as normal under alternating voltage changes.

The above embodiment for preferred embodiment of the present utility model, is not to limit practical range of the present utility model with this just, so all equivalences of doing according to the principle of the utility model change, all should be covered by in the protection range of the present utility model.

Claims

1. a soy bean milk making machine super wide voltage power circuit is characterized in that, comprising:

2. a kind of soy bean milk making machine super wide voltage power circuit according to claim 1 is characterized in that, also comprises: be connected coil L1 one end, the C4 as protection component, R3 and D3.

3. a kind of soy bean milk making machine super wide voltage power circuit according to claim 1 and 2 is characterized in that, also comprises: be connected the coil L3 other end, as the C7 of protection component.