CN101154902A - Starting circuit of single phase asynchronous motor - Google Patents
Starting circuit of single phase asynchronous motor Download PDFInfo
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- CN101154902A CN101154902A CNA2006100537360A CN200610053736A CN101154902A CN 101154902 A CN101154902 A CN 101154902A CN A2006100537360 A CNA2006100537360 A CN A2006100537360A CN 200610053736 A CN200610053736 A CN 200610053736A CN 101154902 A CN101154902 A CN 101154902A
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Abstract
The present invention relates to a single phase acynchronous motor starting circuit which includes an electromagnetic relay K, two alternating current power ends L, N are respectively connected to the two ends of the main winding L1, the starting circuit output end M and the alternating current power end N are respectively connected with the two ends of the motor secondary winding L2, two branch lines are parallel connected between the starting circuit output end M and the alternating current power end L, wherein one branch line includes a running capacitor C7, and the other branch line includes an auxiliary contact of the relay K and a starting capacitor C6 which are connected in series, and an inductance is also connected in series in one branch line of the two branch lines which are parallel connected between the starting circuit output end M and the alternating current power end L. The invention changes the state of the current which flows past the contact of the relay K and prolongs the contact lifetime of the relay K as the inductance L3 is seriously connected with the circuit where the contact of the electric relay K and the running capacitor C7 are; at the same time the invention omits the supply transformer, leads to the small volume and low fabricating cost of the motor starting circuit.
Description
Technical field
The present invention relates to a kind of starting circuit of single phase asynchronous motor, relate in particular to a kind of employing electromagnetic type relay, be used to have the starting circuit of the monopole asynchronous motor that moves capacitor and start capapcitor.
Background technology
So far except adopting centrifugal switch, the starting circuit of monopole asynchronous motor has and adopts relay, have to adopt bidirectional triode thyristor, also has to adopt the PTC element.Adopt the starting circuit of PTC element to be actually a kind of timing circuit, be not subjected to the actual speed of motor in the starting process to change control, generally be used for small machine.The shortcoming of bidirectional triode thyristor and the same contactless wearing and tearing of PTC element, but just present, it is relatively poor to bear superpotential ability.The advantage of electromagnetic type relay is anti-superpotential ability height.This point is also very important, because always can be owing to reasons such as thunder and lightning or operation form overvoltage in the power circuit of motor.The shortcoming of electromagnetic type relay is that contact wear is arranged.For the starting circuit of the monopole asynchronous motor that adopts electromagnetic type relay, the electrical endurance of relay contact is most important.Especially for the monopole asynchronous motor of capacitor start capacitor operating,, can damage start capapcitor even can damage motor,, can only switch in short-term because the start capapcitor that adopts has the non-polar electrolytic capacitor of genus at present in case relay contact is bonding.In this type of former starting circuit of single phase asynchronous motor, after being connected in series, the contact of start capapcitor and relay is connected in parallel with the operation capacitor of motor again.As promptly being to have adopted above-mentioned mode of connection in the Chinese patent literature 200510104256.8 disclosed " starting method of load motor ".Fig. 3 is the partial circuit connection layout of original a kind of starting circuit of single phase asynchronous motor.Among the figure, L1 and L2 are respectively motor main winding and auxiliary winding, when motor starting, and the relay K adhesive, the contact of relay K is connected in parallel in operation capacitor C7 with start capapcitor C6.In short time, the current instantaneous value of the contact of the relay K of flowing through may be very big at the utmost point of the firm adhesive of relay K.This be on the one hand since operation capacitor C7 a little earlier in start capapcitor C6 energising, and the initial voltage of start capapcitor C6 is 0, the transient process of capacitor C7 by the contact discharge of start capapcitor C6 and relay K at this moment can occur moving.According in the residing phase place difference of the moment of relay K adhesive AC power, the discharging current instantaneous value of above-mentioned operation capacitor C7 may be very big.Because in above-mentioned discharge loop, though there are the factors such as contact resistance of the self-inductance of capacitor and resistance, relay contact, because capacitor volume is relatively large, the initial voltage of operation capacitor C7 may be higher, and the discharging current instantaneous value also can be very big in the above-mentioned transient process.On the other hand, the auxiliary winding of AC power by motor is to also the flow through contact of relay K of the electric current of start capapcitor C6 charging, but this electric current will be subjected to the influence of motor windings leakage reactance, resistance and induced potential.The flow through contact of relay K of above-mentioned electric current might make the contact of relay K bonding, causes start capapcitor even motor to damage then.
Summary of the invention
The objective of the invention is to solve the contact bonding technical problem easily of starting circuit repeat circuit of monopole asynchronous motor that is used to have operation capacitor and start capapcitor that adopts electromagnetic type relay, a kind of long service life is provided, safe and reliable, and do not need power transformer, the starting circuit of single phase asynchronous motor that volume is little, cost is low.
Above-mentioned purpose of the present invention is achieved by following technical proposals: a kind of starting circuit of single phase asynchronous motor, comprise an electromagnetic type relay K, two AC power end L, N is connected to the two ends of motor main winding L1 respectively, starting circuit output M and AC power end N are connected to the two ends of motor auxiliary winding L2 respectively, between starting circuit output M and AC power end L, be connected in parallel to two branch roads, wherein a branch road includes operation capacitor C7, another branch road includes an auxiliary contact and the start capapcitor C6 of the relay K that is connected in series, and the branch road in described two branch roads that are connected in parallel between starting circuit output M and AC power end L also is connected in series with inductance L 3.When motor starting, the contacting of described relay K, after motor starting finishes, the contact disjunction of relay K.Owing to there is inductance L 3 to be connected in series in the contact of above-mentioned relay K and the loop at operation capacitor C7 place, changed the situation of electric current of the contact of the relay K of flowing through, the contact endurance of relay K is improved.Usually electromagnetic type relay its contact ability when inductive load will descend, but adds the contact endurance that inductance L 3 instead can improve relay K here, and this is a kind of special situation.In addition, because the inductance value of inductance L 3 selects lessly, under work frequency, the reactance value of inductance L 3 is much smaller than the reactance value of start capapcitor C6 and operation capacitor C7, and it is very little that therefore series connection inserts 3 pairs of excellent start performance influences of inductance L.
As preferably, between starting circuit output M and AC power end L, be connected with operation capacitor C7, be connected in parallel with operation capacitor C7 after one auxiliary contact three of inductance L 3, start capapcitor C6 and relay K is connected in series, discharge resistance R13 and start capapcitor C6 are connected in parallel.
As preferably, between starting circuit output M and AC power end L, be connected with operation capacitor C7, one auxiliary contact three of inductance L 3, start capapcitor C6 and the relay K back that is connected in series is connected in parallel with operation capacitor C7, and discharge resistance R13 is connected in parallel in the series circuit that both are connected in series and by inductance L 3, start capapcitor C6.
As preferably, an auxiliary contact of the relay K that described and start capapcitor C6 are connected in series is a make contact.When make contact is adopted in the contact of above-mentioned relay K, the coil of relay K may only be switched in the short time of motor starting, relay K can be by electrical continuous rate very low intermittent periodic duty or short time duty design, and the volume of relay K can be done very for a short time.Such as the start-up function frequency when motor is n time/hour, and the time that motor one push start process is continued is t second, and then relay can be the intermittent periodic duty design of q by electrical continuous rate, wherein
q＝[t/(3600/n)]×100％.
The t value is generally less than 2.If t=2, n=90, then q=5%=1/20.
As preferably, starting circuit of single phase asynchronous motor of the present invention has a control circuit 1 that is used to control described relay K adhesive and disjunction, two outputs 11 of control circuit 1,12 succeed the coil two ends of electrical equipment K respectively, one power end 13 of control circuit 1 passes through fuse or directly is connected with AC power end L, another power end 14 of control circuit 1 passes through fuse or directly is connected with AC power end N, comprise semiconductor element V in the control circuit 1, the end of described semiconductor element V is connected with the power end 14 of control circuit 1, described semiconductor element V has an end directly to be connected with the output 12 of control circuit 1 in addition or is connected with the output 12 of control circuit 1 by diode, the output of control circuit 1 11 by resistance or by resistance with the series circuit of diode or directly be connected with the power end 13 of control circuit 1; Perhaps, the output 11 of control circuit 1 is connected with the power end 13 of control circuit 1 with the series circuit of diode by inductance or inductance.Do not adopt power transformer among the present invention.The peak value of the rated operational voltage of the coil of relay K can equate with the AC supply voltage peak value or rough equating.Resistance between the power end 13 of described output 11 that is connected in control circuit 1 and control circuit 1 or inductance can suppress the instantaneous overvoltage in the AC power, not necessarily add in order to play the step-down effect.If but consider the coil working overtension of relay K, line is through too small, cause and make difficulty, the cost height, it is not inadvisable fully adopting resistance or inductance double as hypotensive effect between the power end 13 of above-mentioned output 11 that is connected in control circuit 1 and control circuit 1 yet.When relay K was once-through type, the coil of relay K can be connected with the power end 13 of control circuit 1 and the end of semiconductor element V by rectification circuit, and semiconductor element V has the power end 14 of a termination control circuit 1 in addition.The voltage that two power ends of control circuit 1 are 13,14 is the voltage between two AC power end L, N.When semiconductor element V conducting, AC supply voltage connects the coil two ends of relay K after rectification.When relay K was AC type, above-mentioned rectification circuit also can be cancelled, and at this moment, after semiconductor element V conducting, the coil two ends of relay K connect two AC power end L, N.
As preferably, in control circuit 1, the power end 13 of control circuit 1 is by resistance or by inductance or directly be connected with the output 11 of control circuit 1 and an end of capacitor C 1, the other end of capacitor C 1 is connected with diode D1 negative pole and diode D2 positive pole, diode D2 negative pole connects voltage stabilizing didoe D3 negative pole, voltage comparator A1, one end of the positive power source terminal of A2 and resistance R 3, the other end of resistance R 3 is connected with inverting input and the voltage stabilizing didoe D4 negative pole of voltage comparator A1, starting circuit output M is connected with an end of voltage comparator A1 normal phase input end and resistance R 4 with the series circuit of diode D8 by resistance R 6, the other end of resistance R 4, diode D1 and voltage stabilizing didoe D3, the positive pole of D4 is connected with the power end 14 of control circuit 1, capacitor C 3 is in parallel with resistance R 4, the output of voltage comparator A1 is connected with the inverting input of voltage comparator A2 and an end of capacitor C 4 by diode D5, the other end of capacitor C 4 is connected with the power end 14 of control circuit 1, the output of voltage comparator A2 is connected with the control utmost point of controllable silicon V by resistance R 10, the anode of controllable silicon V is connected with the output 12 of control circuit 1, the negative electrode of controllable silicon V and voltage comparator A1, the negative power end of A2 is connected with the power end 14 of control circuit 1.
As preferably, in control circuit 1, one end of capacitor C 1 is by resistance or by inductance or directly be connected with the power end 13 of control circuit 1, by diode or directly be connected with the output 11 of control circuit 1, the other end of capacitor C 1 and diode D1 positive pole, diode D2 negative pole connects, the anodal voltage stabilizing didoe D3 positive pole that connects of diode D2, voltage comparator A1, one end of the negative power end of A2 and resistance R 3, the other end of resistance R 3 is connected with inverting input and the voltage stabilizing didoe D4 positive pole of voltage comparator A1, starting circuit output M is connected with an end of voltage comparator A1 normal phase input end and resistance R 4 with the series circuit of diode D8 by resistance R 6, the other end of resistance R 4, diode D1 and voltage stabilizing didoe D3, the negative pole of D4 is connected with the power end 14 of control circuit 1, capacitor C 3 is in parallel with resistance R 4, the output of voltage comparator A1 is connected with the inverting input of voltage comparator A2 and an end of capacitor C 4 by diode D5, the other end of capacitor C 4 is connected with the power end 14 of control circuit 1, the output of voltage comparator A2 is connected with the control utmost point of bidirectional triode thyristor V by resistance R 10, the T1 utmost point of bidirectional triode thyristor V and voltage comparator A1, the positive power source terminal of A2 is connected with the power end 14 of control circuit 1, and the T2 utmost point of bidirectional triode thyristor V passes through diode or directly is connected with the output 12 of control circuit 1.
The voltage at motor auxiliary winding L2 two ends raises with the rising of motor speed, this voltage is received voltage comparator A1 input by resistance R 6, diode D8, voltage comparator A1 output connects voltage ratio than the A2 input, voltage comparator A2 output is controlled the conducting of semiconductor element V and is ended, thus the adhesive of control relay K and disjunction.
The invention has the beneficial effects as follows:, improved the electrical endurance of relay K owing in the loop at the contact of relay K and operation capacitor C7 place, add the inductance L 3 that is connected in series; The present invention does not adopt power transformer, and the resistance in the control circuit 1, electric capacity and semiconductor device part are made integrated circuit or thick film circuit easily, and the volume of starting circuit of single phase asynchronous motor is little, cost is low so can make.
Description of drawings
Fig. 1 is a kind of circuit connection diagram of the present invention.
Fig. 2 is another circuit connection diagram of the present invention.
Fig. 3 is the partial circuit connection layout of original a kind of starting circuit of single phase asynchronous motor.
Among the figure: 1. control circuit, 11,12. control circuit outputs, 13,14. control circuit power ends, K. relay, L1. motor main winding, L2. motor auxiliary winding, L, N. AC power end, M. starting circuit output.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment 1: as Fig. 1, present embodiment comprises an electromagnetic type relay K, be used to control the control circuit 1 of described relay K adhesive and disjunction, two outputs 11 of control circuit 1,12 succeed the coil two ends of electrical equipment K respectively, two power ends 13 of control circuit 1,14 meet two AC power end L respectively, N, two AC power end L, N is connected to the two ends of motor main winding L1 respectively, starting circuit output M and AC power end N are connected to the two ends of motor auxiliary winding L2 respectively, be connected to operation capacitor C7 between starting circuit output M and the AC power end L, inductance L 3, be connected in parallel with operation capacitor C7 after one secondary make contact three of start capapcitor C6 and relay K is connected in series, discharge resistance R13 and start capapcitor C6 are connected in parallel.Control circuit 1 is by resistance, electric capacity, diode, voltage comparator A1, A2 and controllable silicon V form, AC power end L is connected with the output 11 of control circuit 1 and an end of capacitor C 1 by resistance R 0, the other end of capacitor C 1 is connected with diode D1 negative pole and diode D2 positive pole, resistance R 1 is in parallel with capacitor C 1, diode D2 negative pole is connected with AC power end N by capacitor C 2, by resistance R 2 and voltage stabilizing didoe D3 negative pole, voltage comparator A1, the positive power source terminal of A2, one end of the negative pole of diode D6 and D7 and resistance R 3 connects, the other end of resistance R 3 is connected with inverting input and the voltage stabilizing didoe D4 negative pole of voltage comparator A1, starting circuit output M is connected with diode D8 is anodal by resistance R 6, diode D8 negative pole and voltage comparator A1 normal phase input end, one end of diode D6 positive pole and resistance R 4 connects, the other end of resistance R 4, diode D1 and voltage stabilizing didoe D3, the positive pole of D4 meets AC power end N, capacitor C 3 is in parallel with resistance R 4, the output of voltage comparator A1 is connected with diode D5 is anodal, diode D5 negative pole and diode D7 positive pole, one end of the inverting input of voltage comparator A2 and capacitor C 4 connects, another termination AC power end N of capacitor C 4, resistance R 5 is in parallel with diode D7, the normal phase input end of voltage comparator A2 meets voltage comparator A1 by resistance R 7, the positive power source terminal of A2, connect the output of voltage comparator A2 by resistance R 9, meet AC power end N by resistance R 8, the output of voltage comparator A2 connects the control utmost point of controllable silicon V by resistance R 10, the output 12 of the anode connection control circuit 1 of controllable silicon V, the negative electrode of controllable silicon V and voltage comparator A1, the negative power end of A2 is connected with AC power end N, and capacitor C 5 two ends are the output 11 of connection control circuit 1 respectively, 12.Resistance R 0, R1, capacitor C 1, C2, diode D1, D2 form the circuit that suppresses the instantaneous overvoltage in the AC power, and the instantaneous overvoltage of the output 11 of control circuit 1 is inhibited.Resistance R 0 can be replaced by a small inductor.Simultaneously, foregoing circuit is added the power circuit of resistance R 2 and voltage stabilizing didoe D3 formation control circuit 1, voltage stabilizing didoe D3 two ends output low-voltage regulated power supply.After the energized, because the initial voltage at capacitor C 4 two ends is 0 in the control circuit 1, voltage comparator A2 exports high level, controllable silicon V conducting, and the relay K adhesive makes inductance L 3 and starting capacitance C6 be connected in series back and operation capacitor C7 connection in parallel.After rotating speed of motor raises, the starting circuit output is that the end M voltage of motor auxiliary winding L2 rises, by resistance R 4, R6, the step-down rectifying circuit that diode D6, D8 and capacitor C 3 are formed, the voltage of voltage comparator A1 normal phase input end is raise, when this voltage is elevated to voltage above voltage stabilizing didoe D4, voltage comparator A1 output becomes high level, and make voltage comparator A2 output low level by diode D5, controllable silicon V ends, make relay K discharge inductance L 3 and start capapcitor C6 and power supply disjunction.Resistance R 5, diode D7 is the element that discharges and recharges of capacitor C 4.Resistance R 7, R8, R9 form bleeder circuit, for the normal phase input end of voltage comparator A2 provides voltage.Here semiconductor device V is a controllable silicon.In the present embodiment, power of motor 1.1KW, the capacity of operation capacitor C7 and start capapcitor C6 is respectively 30 μ f and 200 μ f, inductance L 3 diameter 40mm, the number of turn is 20 circles, line is through 0.55 millimeter, and is hollow.Because the existence of inductance L 3, the contact endurance of relay K is improved.When relay coil power was 20W, the electrical endurance of relay contact was greater than 200,000 times.If but do not have inductance L 3, and other condition is identical, and then the electrical endurance of relay contact has only thousands of times.Though should be pointed out that the power of relay is 20W here, because relay K is by breaking off periodic duty design, its weight is 24 grams only, its volume and cost and be that the relay of 1W is identical by the coil power of continuous duty design.Because 1 of control circuit is made up of resistance, electric capacity and semiconductor device, do not have power transformer again, so whole starting circuit volume is little, cost is low.
Embodiment 2: as Fig. 2, all the other are identical with embodiment 1 except that the connection of control circuit 1 and discharge resistance R13 for present embodiment.Discharge resistance R13 is connected in parallel in the series circuit that both are connected in series and by inductance L 3, start capapcitor C6.Control circuit 1 is by resistance, electric capacity, diode, voltage comparator A1, A2 and bidirectional triode thyristor V form, AC power end L is by resistance R 0 and diode D9 negative pole, diode D11 positive pole, one end of capacitor C 1 connects, capacitor C 1 other end and diode D1 positive pole, diode D2 negative pole connects, resistance R 1 is in parallel with capacitor C 1, diode D2 is anodal to be connected with AC power end N by capacitor C 2, by resistance R 2 and voltage stabilizing didoe D3 positive pole, voltage comparator A1, the negative power end of A2, diode D6 and D7 positive pole, one end of resistance R 3 connects, the other end of resistance R 3 is connected with inverting input and the voltage stabilizing didoe D4 positive pole of voltage comparator A1, starting circuit output M is by the negative pole of resistance R 6 with diode D6 and D8, one end of resistance R 12 connects, diode D8 is anodal to be connected with an end of voltage comparator A1 normal phase input end and resistance R 4, the other end of resistance R 4 and R12, diode D1 and voltage stabilizing didoe D3, the negative pole of D4 meets AC power end N, capacitor C 3 is in parallel with resistance R 4, the output terminating diode D5 negative pole of voltage comparator A1, anodal and the diode D7 negative pole of diode D5, one end of the inverting input of voltage comparator A2 and capacitor C 4 connects, another termination AC power end N of capacitor C 4, resistance R 5 is in parallel with diode D7, the normal phase input end of voltage comparator A2 meets voltage comparator A1 by resistance R 7, the negative power end of A2, connect the output of voltage comparator A2 by resistance R 9, meet AC power end N by resistance R 8, the output of voltage comparator A2 is connected with the control utmost point of bidirectional triode thyristor V and an end of resistance R 11 by resistance R 10.The other end of resistance R 11, the positive supply termination AC power end N of the T1 utmost point of bidirectional triode thyristor V and voltage comparator A1, A2.The T2 utmost point of bidirectional triode thyristor V is connected with the negative pole of the positive pole of diode D12 and diode D10.The positive pole of diode D9 and D10 is connected with the output 11 of control circuit 1 and an end of capacitor C 5, the output 12 of the negative pole connection control circuit 1 of diode D11 and D12 and the other end of capacitor C 5.Semiconductor element V in the present embodiment is a bidirectional triode thyristor, conducting when voltage comparator A2 output is low level, and at this moment alternating voltage is through being added on the coil of relay K after full-wave rectification and the filtering.Resistance R 4, R6, R12, capacitor C 3, diode D6, D8 form step-down rectifying circuit, the voltage signal of starting circuit output M are received the positive input of voltage comparator A1.All the other are with embodiment 1.
Embodiment 3: present embodiment is except that the connection of inductance L 3, the remaining circuit connection is identical with embodiment 1, in the present embodiment promptly, be connected in parallel to two branch roads between starting circuit output M and the AC power end L: one for moving the series circuit that capacitor C7 and inductance L 3 are connected in series; One is a secondary make contact of relay K and series circuit that start capapcitor C6 is connected in series, and discharge resistance R13 and start capapcitor C6 are connected in parallel.The effect of present embodiment is identical with embodiment 1, just the line of inductance L 3 is through wanting big, because it is long-term energising when motor moves, and the line of the inductance L 3 among embodiment 1 and the embodiment 2 warp can be by discrete duty design, its design principle is identical with relay K.
Claims (7)
1. starting circuit of single phase asynchronous motor, comprise an electromagnetic type relay (K), two AC power end (L, N) be connected to the two ends of motor main winding (L1) respectively, starting circuit output (M) and AC power end (N) are connected to the two ends of motor auxiliary winding (L2) respectively, between starting circuit output (M) and AC power end (L), be connected in parallel to two branch roads, wherein a branch road includes operation capacitor (C7), another branch road includes an auxiliary contact and the start capapcitor (C6) of the relay (K) that is connected in series, and it is characterized in that: the branch road in described two branch roads that are connected in parallel between starting circuit output (M) and AC power end (L) also is connected in series with inductance (L3).
2. starting circuit of single phase asynchronous motor according to claim 1, it is characterized in that: between starting circuit output (M) and AC power end (L), be connected with operation capacitor (C7), be connected in parallel with operation capacitor (C7) after one auxiliary contact three of inductance (L3), start capapcitor (C6) and relay (K) is connected in series, discharge resistance (R13) is connected in parallel with start capapcitor (C6).
3. starting circuit of single phase asynchronous motor according to claim 1, it is characterized in that: between starting circuit output (M) and AC power end (L), be connected with operation capacitor (C7), one auxiliary contact three of inductance (L3), start capapcitor (C6) and relay (K) back that is connected in series is connected in parallel with operation capacitor (C7), and discharge resistance (R13) is connected in parallel in the series circuit that both are connected in series and by inductance (L3), start capapcitor (C6).
4. starting circuit of single phase asynchronous motor according to claim 1 is characterized in that: an auxiliary contact of the relay (K) that is connected in series with start capapcitor (C6) in the described branch road that is connected between starting circuit output (M) and AC power end (L) is a make contact.
5. according to claim 1 or 2 or 3 or 4 described starting circuit of single phase asynchronous motor, it is characterized in that: a control circuit (1) that is used to control (K) adhesive of described relay and disjunction is arranged, two outputs (11 of control circuit (1), 12) succeed the coil two ends of electrical equipment (K) respectively, one power end (13) of control circuit (1) passes through fuse or directly is connected with AC power end (L), another power end (14) of control circuit (1) passes through fuse or directly is connected with AC power end (N), comprise semiconductor element (V) in the control circuit (1), one end of described semiconductor element (V) is connected with the power end (14) of control circuit (1), described semiconductor element (V) has an end directly to be connected with the output (12) of control circuit (1) in addition or is connected with the output (12) of control circuit (1) by diode, the output (11) of control circuit (1) directly is connected with the power end (13) of control circuit (1), perhaps is connected with the power end (13) of control circuit (1) with the series circuit of diode by resistance or resistance; Perhaps, the output (11) of control circuit (1) is connected with the power end (13) of control circuit (1) with the series circuit of diode by inductance or inductance.
6. starting circuit of single phase asynchronous motor according to claim 5, it is characterized in that: in the control circuit (1), the power end (13) of control circuit (1) directly is connected with an end of the output (11) of control circuit (1) and electric capacity (C1), or connect by resistance, or connect by inductance, the other end of electric capacity (C1) is connected with diode (D1) negative pole and diode (D2) positive pole, diode (D2) negative pole connects voltage stabilizing didoe (D3) negative pole, voltage comparator (A1, one end of positive power source terminal A2) and resistance (R3), the other end of resistance (R3) is connected with the inverting input and voltage stabilizing didoe (D4) negative pole of voltage comparator (A1), starting circuit output (M) is connected with an end of voltage comparator (A1) normal phase input end and resistance (R4) with the series circuit of diode (D8) by resistance (R6), the other end of resistance (R4), diode (D1) and voltage stabilizing didoe (D3), (D4) positive pole is connected with the power end (14) of control circuit (1), electric capacity (C3) is in parallel with resistance (R4), the output of voltage comparator (A1) is connected with the inverting input of voltage comparator (A2) and an end of electric capacity (C4) by diode (D5), the other end of electric capacity (C4) is connected with the power end (14) of control circuit (1), the output of voltage comparator (A2) is connected with the control utmost point of controllable silicon (V) by resistance (R10), the anode of controllable silicon (V) is connected the negative electrode of controllable silicon (V) and voltage comparator (A1 with the output (12) of control circuit (1), A2) negative power end is connected with the power end (14) of control circuit (1).
7. starting circuit of single phase asynchronous motor according to claim 5, it is characterized in that: in the control circuit (1), one end of electric capacity (C1) is by resistance or by inductance or directly be connected with the power end (13) of control circuit (1), by diode or directly be connected with the output (11) of control circuit (1), the other end of electric capacity (C1) and diode (D1) positive pole, diode (D2) negative pole connects, anodal voltage stabilizing didoe (D3) positive pole that connects of diode (D2), voltage comparator (A1, one end of negative power end A2) and resistance (R3), the other end of resistance (R3) is connected with the inverting input and voltage stabilizing didoe (D4) positive pole of voltage comparator (A1), starting circuit output (M) is connected with an end of voltage comparator (A1) normal phase input end and resistance (R4) with the series circuit of diode (D8) by resistance (R6), the other end of resistance (R4), diode (D1) and voltage stabilizing didoe (D3), (D4) negative pole is connected with the power end (14) of control circuit (1), electric capacity (C3) is in parallel with resistance (R4), the output of voltage comparator (A1) is connected with the inverting input of voltage comparator (A2) and an end of electric capacity (C4) by diode (D5), the other end of electric capacity (C4) is connected with the power end (14) of control circuit (1), the output of voltage comparator (A2) is connected with the control utmost point of bidirectional triode thyristor (V) by resistance (R10), (T1) utmost point of bidirectional triode thyristor (V) and voltage comparator (A1, A2) positive power source terminal is connected with the power end (14) of control circuit (1), and (T2) utmost point of bidirectional triode thyristor (V) passes through diode or directly is connected with the output (12) of control circuit (1).
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| CNA2006100537360A CN101154902A (en) | 2006-09-30 | 2006-09-30 | Starting circuit of single phase asynchronous motor |
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| CNA2006100537360A CN101154902A (en) | 2006-09-30 | 2006-09-30 | Starting circuit of single phase asynchronous motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102640064A (en) * | 2009-10-22 | 2012-08-15 | 思科普有限责任公司 | A motor and a relay for a motor |
| CN103378770A (en) * | 2012-04-20 | 2013-10-30 | 珠海格力电器股份有限公司 | Compressor starting circuit, air conditioner and compressor starting method |
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2006
- 2006-09-30 CN CNA2006100537360A patent/CN101154902A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102640064A (en) * | 2009-10-22 | 2012-08-15 | 思科普有限责任公司 | A motor and a relay for a motor |
| CN102640064B (en) * | 2009-10-22 | 2015-12-09 | 思科普有限责任公司 | Motor and the relay for motor |
| CN103378770A (en) * | 2012-04-20 | 2013-10-30 | 珠海格力电器股份有限公司 | Compressor starting circuit, air conditioner and compressor starting method |
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Application publication date: 20080402 |