CN202059291U

CN202059291U - Current resonance type motor formed by winding coils and capacitor

Info

Publication number: CN202059291U
Application number: CN2011201356246U
Authority: CN
Inventors: 牛培元
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-03
Filing date: 2011-05-03
Publication date: 2011-11-30
Anticipated expiration: 2021-05-03

Abstract

The utility model provides a current resonance type motor formed by winding coils and a capacitor. Set frequency is higher than power frequency by several times, thus the quantity of the used iron cores and copper can be reduced proportionably, further an induction machine is lighter, and cost is not increased since a power supply for waveform modulation is not required. Two groups of oscillating circuits are connected in series to be two-step partial pressure, the requirement on the withstand voltage of the motor is not need to be improved, and the multiple of the motor resonance winding split pole increases, and the rotation speed of the motor still keeps consistent with that of a general-purpose motor, so that the motor is practical.

Description

The current-resonance type motor that constitutes by winding coil and electric capacity

Technical field

The utility model relates to a kind of motor, especially the current-resonance type motor that is made of winding coil and electric capacity.

Background technology

The alternating current general-purpose frequency of existing motor is the 50HZ power frequency, inconvenience is used for light equipment, if make power supply be modulated into the alternating current of similar sine wave again through ac-dc conversion, can set the frequency that is higher than the power frequency several times, ratio ground be can be bordering on and used iron core and copper material reduced, make it lightweight, this mode cost is very high; And all types of motors do not adopt mode of resonance, are difficult to the resonance potential of its multiplication.

The utility model content

The utility model provides a kind of current-resonance type motor that is made of winding coil and electric capacity, the power supply of modulation waveform needn't be set and not increase cost, two groups of oscillating circuit series connection are 2 rank dividing potential drops, do not increase the requirement of withstand voltage of motor, can set higher frequency, light weight material saving and practicality.

Design is for this reason: its equipment comprises three-phase or single-phase bridge rectification filter circuit, two groups of winding coils of motor constitute two groups of bridge oscillator circuits of phase-splitting respectively with electric capacity, power supply forms impartial second order dividing potential drop for two groups of oscillating circuits of series connection, two groups of oscillating circuits are set up the last half-bridge or the following half-bridge current over-zero detection circuits for triggering of control oscillating current switch, and the current peak that is used as one group of oscillating circuit phase shift wherein detects circuits for triggering, in two groups of coils on stator, yoke between wire casing is divided row parallel arranged separately, its with respect to the gap of the position of direction of rotation equal the wire casing spacing half.

Two groups of bridge oscillator circuits in this device structure make it produce phase difference

Two groups of oscillating currents in cycle and make motor form directed rotation, the zero passage detection circuits for triggering of being set up have guaranteed continuous vibration conversion, two groups of bridge oscillator circuits are connected into 2 rank dividing potential drops for power supply, though oscillating voltage increases more than 1 times, do not increase requirement of withstand voltage to each parts, moreover the multiple that makes the motor windings split pole is not less than the multiple that setpoint frequency is higher than power frequency, even its rotating speed still maintains the rotating speed of general-purpose machine, two groups of coils of motor phase-splitting divide the groove coiling separately, and at neighbouring part for being enough to make phase difference approximately with groove and around formed mutual inductance The electric current of one group of coil when rising, just passive slightly decline of another group electric current is had acceleration, be illustrated below in conjunction with specific embodiment and accompanying drawing.

Description of drawings:

Fig. 1, be the block diagram of motor device structure described in the utility model.

The split pole schematic diagram of two groups of winding coils of Fig. 2, motor phase-splitting.

The schematic diagram of Fig. 3, motor circuit.

The current waveform comparison diagram of Fig. 4, two groups of oscillating circuits.

Yoke in two groups of coils of Fig. 5 forms the schematic diagram of the alternate position spike distance of instantaneous minute pole field of two rows.

Embodiment

Comprise three-phase bridge rectifier circuit 1 with reference to motor device structure of the present utility model shown in Figure 1, it and single-phase rectifier filter circuit 2 are connected through commutation circuit and motor circuit, second group of oscillating circuit 4 of first group of oscillating circuit 3 of bridge-type and bridge-type connected, the last half-bridge current over-zero of second group of oscillating circuit detects circuits for triggering 7 and is connected certainly with this group oscillating circuit 4, its effect is taken a sample first, and it goes up the half-bridge current zero-crossing signal, second controls the conducting of its time half-bridge current switch element; Conversely under second group the zero passage detection circuits for triggering 8 of half-bridge same oneself is connected with this group circuit, it acts on its half-bridge current zero-crossing signal down of taking a sample first, second control the conducting of half-bridge current switch element on it, promptly guaranteed the conversion of vibrating continuously of second group of circuit.Half-bridge current peak detection circuits for triggering 6 all are connected with this group oscillating circuit 4 and first group of oscillating circuit 3 on second group of oscillating circuit, its effect first on second group of oscillating circuit 4 the peak sample signal of half-bridge current, second control the conducting of the following half-bridge current switch element of first group of oscillating circuit 3, make the triggered time of half-bridge current switch under first group of circuit that shakes lag behind second group approximately Promptly formed the phase shift of first group of electric current; Moreover the half-bridge current over-zero detects circuits for triggering 5 and this group oscillating circuit 3 oneself is connected under first group of oscillating circuit, the current zero-crossing signal of half-bridge under its effect is taken a sample first, second control the conducting of half-bridge current switch element on it, so promptly finished first group of oscillating circuit and followed second group and the cycle of oscillation of phase shift.Fig. 4 is the current waveform comparison diagram of two groups of oscillating circuits, can find out the feature of vibration nature conversion; Fig. 2 is the split pole schematic diagram of two groups of winding coils of motor phase-splitting, in conjunction with Fig. 4 as can be seen two groups of out-of-phse currents form the principle of rotating magnetic fields; Fig. 5 show two groups in the coil-winding yoke and behavior two row's alternate position spike distance.Followingly be described further with reference to circuit theory diagrams Fig. 3.

As shown in Figure 3 among the embodiment; Form the direct voltage of low ripple by three-phase bridge rectifier circuit 1, first group of oscillating circuit 3 forms power supplys 2 rank dividing potential drops with the second group of oscillating circuit 4 that is in series, because the dynamic equalization effect of identical two the series connection oscillating circuits of parameter makes its dividing potential drop comparatively impartial; Second group of bridge oscillator circuit mainly comprises oscillating capacitance 37, machine winding coil 16 and current switch element 13 and 17 (among the figure not the drive part of display switch element), at the circuit for regulating and controlling that this oscillating circuit 4 is set up is that half-bridge current over-zero detects in the circuits for triggering 7 input and the binding of resistance 19 two ends as signal amplifier 18 on it, resistance 19 is connected on the upper end of half-bridge switch pipe 17, by the current signal of the last half-bridge of resistance 19 sampling through operational amplifier 18 amplifications, and import its zero passage detection that links and trigger integrated circuit 21, the optical coupler 22 that the current zero-crossing signal that detects is connected through this integrated circuit 21 again, produce as the signal that drives, the following half-bridge current switch pipe 13 that i.e. input is connected with optical coupler 22, make switching tube 13 in this conducting, make its down half-bridge current lead-through thereon after the zero passage of half-bridge current therefrom; Conversely, current sampling resistor 12 two ends of following half-bridge switch pipe 13 lower ends series connection of this group oscillating circuit 4 descend the input of the signal amplifier 11 in half-bridge zero passage detection circuits for triggering 8 to be connected with it, the signal that is exaggerated is promptly imported the zero passage detection that is connected with amplifier 11 and is triggered integrated circuit 10, the current zero-crossing signal that detects produces as the signal that drives through the optical coupler 9 that is connected with this integrated circuit 10 again, promptly import the last half-bridge switch pipe 17 that is linked with optical coupler 9, make switching tube 17 in this conducting, so promptly form the current oscillation conversion continuously of second group of oscillating circuit.First group of oscillating circuit 3 mainly comprises oscillating capacitance 38, machine winding coil 32 and current switch element 33 and 29; The input that the half-bridge current peak detects the signal amplifier 23 in the circuits for triggering 6 on second group of oscillating circuit also is connected the two ends as the resistance 19 of half-bridge current signal in second group of the sampling, current signal process signal amplifier 23 amplifications of sampling and the current peak detection triggers 26 that input is connected with amplifier 23, so-called current peak detector comprises its preposition electric capacity 35 and diode 36, the principle of its effect is: when sampled signal when electric current rises, the variation voltage of electric capacity 35 transmission is clamped at 0.7V by diode 36 and no longer rises, and electric current is through peak value when changing trailing edge over to, the voltage of electric capacity 35 transmission is reduced to negative value by 0.7V, can pick the peak value of current signal thus.The current switch pipe 29 of half-bridge is connected under current peak detection triggers 26 and the first group of oscillating circuit, the peak value triggering signal that is detected by current peak detection triggers 26 makes this current switch pipe 29 conductings, and the triggering and conducting time lag that promptly is half-bridge current under first group of oscillating circuit is in second group of about 1/4 cycle of oscillating current.Moreover, the two ends of the current signal sample resistance 24 of half-bridge are connected with the input that the following half-bridge current over-zero of this group oscillating circuit detects the signal amplifier 25 in the circuits for triggering 5 under first group of oscillating circuit, after current sampling signal amplifies, the zero passage detection that i.e. input is connected with signal amplifier 25 triggers integrated circuit 28, detect current zero-crossing signal by integrated circuit 28, produce as the signal that drives through the optical coupler 27 that is connected with this integrated circuit 28 again, the current switch pipe 33 of half-bridge on first group of oscillating circuit that i.e. input is connected with optical coupler 27, make switching tube 33 in this and conducting, so promptly finished first group of oscillating circuit and followed second group and the cycle of oscillation of phase shift.So after half-bridge current switch pipe 17 was begun to start on second group of oscillating circuit, two groups of oscillating circuits can enter orderly and continuous vibration conversion.

As shown in Figure 5, among the embodiment, yoke AB in the coil of top ... yoke A ' B ' in the FGH lower coil relative with it ... and behavior two rows, in one group coil between one section coiling 2 of one section of the lower end of yoke A coiling 1 and the upper end of the relative yoke A ' of another group in coil with groove and around, the passive conversion when mutual mutual inductance is enough to promote electric current decline separately.

Claims

1. current-resonance type motor that constitutes by winding coil and electric capacity, it is characterized by: the winding coil and the electric capacity of motor have constituted bridge oscillator circuit, and two groups of bridge oscillator circuits wherein and the binding of power supply are for connecting.

2. the current-resonance type motor that is made of winding coil and electric capacity according to claim 1 is characterized by: its power supply forms 2 impartial rank dividing potential drops for two groups of bridge oscillator circuits of series connection.

3. the current-resonance type motor that is made of winding coil and electric capacity according to claim 1 is characterized by: one group oscillating circuit than the phase difference of another group oscillating circuit is

Cycle of oscillation.

4. the current-resonance type motor that is made of winding coil and electric capacity according to claim 1 is characterized by: in two groups of coils on stator, the yoke between wire casing is divided row parallel arranged separately.

5. the current-resonance type motor that is made of winding coil and electric capacity according to claim 4 is characterized by: the yoke of dividing row to arrange between wire casing separately in two groups of coils, its equal half of wire casing spacing with respect to the gap of the position of direction of rotation.