CN2324694Y - Stageless speed-variable electric motor - Google Patents

Abstract

The utility model relates to a stepless speed regulation electric motor, particularly a brushless and stepless speed regulation torque-typed motor suitable for middle and small power. The utility model is composed of a motor and a control circuit, wherein, four star-shaped connection wires and output control wires of the stator winding of the motor comprise three phase wires and one central wire; the control circuit is composed of a clock circuit IC1 whose frequency can be adjusted, a pulse width adjustable circuit IC2, a pulse distribution circuit IC3, etc.; the pulse outputted by the clock circuit IC1 whose frequency can be adjusted is inputted into the pulse width adjustable circuit IC2; the pulse outputted by the pulse width adjustable circuit IC2 is connected with motor coils L1, L2 and L3 through the pulse distribution circuit IC3 and control switch devices K1, K2 and K3. The utility model has the advantages of stable rotary speed, large torque, simple control circuit, low cost, etc.

Description

Motor with stepless speed regulation

The utility model relates to a kind of motor with stepless speed regulation, is specially adapted to the motor of the brushless stepless speed regulation of torque type of middle low power.

Prior art usually adopts synchronous machine to carry out stepless speed regulation, and it is big that synchronous machine has moment, and torque rotary speed is stable, moves advantage such as fast.But because control circuit is very complicated, and shortcoming such as cost an arm and a leg, fail to use on a large scale the particularly application in middle and small motor always.In addition, reluctance motor is the new product of developing in recent years, and it is simple that reluctance motor has a control circuit, and device security advantages of higher, its speed adjusting performance, price the aspect such as compare and be better than other like product, thereby are paid attention to both at home and abroad.But because this kind electric motor starting moment is little, and the internal structure design reasons, the utilance of silicon steel sheet is only accounted for about the 20%-30% of silicon steel sheet area, certainly will cause certain waste to raw material.

The purpose of this utility model provides a kind of stabilization of speed, moment is big, the life-span is long, control circuit is simple, price is low, can be widely used in the motor with stepless speed regulation of dynamic property products such as various family expenses, industrial electrical equipment.

The purpose of this utility model is to realize by the following technical solutions: the utility model is made up of motor and control circuit, the stator winding star-star connection of motor, 4 of output control lines comprise 3 phase lines, 1 center line, control circuit is by the clock circuit IC1 of frequency adjustable, pulsewidth conditioned circuit IC2, formations such as pulse distributor IC3, the pulse of the clock circuit IC1 output of frequency adjustable is input to pulsewidth conditioned circuit IC2, and the pulse of pulsewidth conditioned circuit IC2 output is through pulse distributor IC3 and control switch device K1, K2, K3 connects motor winding L1, L2, L3.Motor with stepless speed regulation of the present utility model is that conventional synchronous machine is one with reluctance motor is organically molten, it is that the speed regulator principle of reluctance motor is applied in efficiently on the three-phase permanent-magnetic synchronous motors, therefore the moment and the service performance of synchronous machine have been obtained, and simple in structure, the characteristics such as cost is low, device security of reluctance motor speed regulator, thereby improved the range of application of middle-size and small-size buncher greatly.

The utility model compared with prior art has advantages such as stabilization of speed, moment is big, control circuit is simple, price is low.

Drawing of the present utility model is described as follows:

Fig. 1 is a theory diagram of the present utility model.

Fig. 2 is the oscillogram of each point among Fig. 1

Below in conjunction with description of drawings, the utility model is described in further detail: as shown in Figure 1, BB comprises motor and speed regulating control two partly, and its structure designs by permagnetic synchronous motor.The number of poles of motor is more than or equal to 8, and winding is pressed the three-phase coiling, star-star connection, and center line is drawn.Complete machine adopts 4 line traffic controls, i.e. 3 phase lines, 1 center line.Clock circuit IC1 in the control circuit, the clock pulse CK of generation frequency adjustable, its cycle is T.IC2 is the pulsewidth conditioned circuit that is driven by CK, and producing width W is adjustable pulse, and when the period T of CK pulse diminished, the width W of E pulse broadened.IC3 is a pulse distributor, and the pulse duration of pressing E produces the control impuls A of three phase places, B, and C, control impuls A, B, C be control switch device K1, K2, K3 respectively, connects corresponding motor coil L 1, L2, L3.Motor will be by the sequential operation of IC3 output.So, the pulse duration of IC3 is controlled by the frequency of IC1, the frequency of IC1 becomes synchronous forward to change with the pulse duration of IC3, the frequency that is IC1 is high more, the pulse of IC3 is wide more, and rotating speed of motor also increases thereupon, when frequency is raised to rated value, the pulsewidth of IC3 reaches the wideest, and rotating speed of motor also reaches the highest simultaneously.The clock circuit IC1 of frequency adjustable selects integrated package NE555 for use.Pulsewidth conditioned circuit IC2 selects integrated package NE555 for use.Pulse distributor IC3 selects integrated package CD4017 for use.As shown in Figure 2, CK among Fig. 2, E, A, B, the waveform of C each point represent that frequency is low, the control waveform when promptly rotating speed is low, and CK1, E1, A1, B1, parameter T1 shown in the waveform that C1 etc. are corresponding reaches, W1 represents the frequency height, the waveform when promptly rotating speed is high.System design of the present utility model is the direct current input, i.e. the V1 of Fig. 1 and V2 end.When the utility model is used for alternating current circuit, need only convert the direct current place in circuit to rectifier, can move.

Claims (4)

1, a kind of motor with stepless speed regulation, formed by motor and control circuit, the stator winding star-star connection of motor, 4 of output control lines comprise 3 phase lines, 1 center line, it is characterized in that control circuit is made of clock circuit IC1, pulsewidth conditioned circuit IC2, the pulse distributor IC3 etc. of frequency adjustable, the pulse of the clock circuit IC1 output of frequency adjustable is input to pulsewidth conditioned circuit IC2, and the pulse of pulsewidth conditioned circuit IC2 output is connected motor winding L1, L2, L3 through pulse distributor IC3 with control switch device K1, K2, K3.

2,, it is characterized in that the clock circuit IC1 of frequency adjustable selects integrated package NE555 for use according to the described motor with stepless speed regulation of claim 1.

3,, it is characterized in that pulsewidth conditioned circuit IC2 selects integrated package NE555 for use according to the described motor with stepless speed regulation of claim 1.

4,, it is characterized in that pulse distributor IC3 selects integrated package CD4017 for use according to the described motor with stepless speed regulation of claim 1.

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