CN2483729Y

CN2483729Y - Clearable counter of watt-hour meter with stepping motor which can rotate forward and backward

Info

Publication number: CN2483729Y
Application number: CN 01223219
Authority: CN
Inventors: 王济生
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-09
Filing date: 2001-05-09
Publication date: 2002-03-27
Anticipated expiration: 2011-05-09

Abstract

The utility model has an electric meter register which can be reset with a positive inversion stepping motor, which comprises a permanent magnetic type stepping motor, a register stent and a counter part which consists of a character wheel, a carry wheel and a reduction gear. Two permanent magnet rotors are fixed on the shaft of the stepping motor with interval, and two groups of stator and coil which are corresponding with the two rotors are arranged on the stent. When the two corresponding stator and rotor works respectively, the rotating directions of the motor shaft are opposite, and the different rotating directions are used for registering and resetting. The projecting lines of the two permanent magnet rotors magnetic poles which are in the same direction on the plane which is vertical with the motor shaft are intersected and form an angle, and the angle is in the range of 10-180 degrees.

Description

But zero clearing ammeter register with rotating stepper motor

But the zero clearing ammeter register that the utlity model has the rotating stepper motor belongs to the Electric energy meter KWh counter technical field.

Existing electronic electric energy meter register is to be rotated by the electronic circuit drive stepping motor in the electric energy meter, drives register by gear train again and rotates, and will be recorded on the register by the electric weight of electric energy meter.But this electric energy meter can not allow the counting on the Electric energy meter KWh counter get back to zero-bit.Along with raising, the prolongation in serviceable life of electric energy meter quality, produced a kind of ammeter register counting character wheel after certain service time that requires and to have got back to the needs of zero-bit.Reinstall back zero method and not only bother if adopt the register character wheel pulled down, also can influence the precision of register itself.

The purpose of this utility model provides a kind of character wheel of counting can return zero Electric energy meter KWh counter, and the samsara of this register count word does not influence the precision of electric energy meter when zero.

The further purpose of the utility model is to have proposed a kind of two groups of magneto rotors, and stepper motor corresponding two groups of stators and coil, can forward and reverse rotation adorned on a step motor shaft.

Further purpose of the present utility model is, thereby provides the mutual interference of a kind of two groups of coaxial magneto rotor phases very little of the very little rotating stepper motor of stepper motor moment output influence.

The further purpose of the utility model provides a kind of register of energy accurate measurement different time sections power consumption

The brief introduction of utility model structure:

But the zero clearing ammeter register that the utlity model has the rotating stepper motor comprises p-m step motor, the register support, reach the counter unit that constitutes by character wheel, rounding wheel, reduction gearing, the compartment of terrain is fixed two permanent magnet rotor and two groups of corresponding with these two rotors respectively stator and coils is set on frame in the rotating shaft of described stepper motor, when described two corresponding stator and rotor are worked respectively, the direction of rotation of rotor is respectively applied for meter degree and zero clearing; The magnetic pole in the same way of two permanent magnet rotor with the vertical plane of machine shaft on projection line intersect and do not overlap, intersect the angle that constituted in 10-180 degree scope.

The utility model further comprises: the rotor slot geometric figure of described two groups of stators is with respect to being to be symmetrical arranged in the coordinate system at center with the machine shaft line; Angle between described two rotor magnetic pole projection lines is positioned at 80-160 degree scope.Two described registers of installing on same frame, or two described registers are one by the frame secure bond, and available two registers measure the power consumption of different time sections respectively.Described two stepper motors are positioned at same or two antimagnetic shells.

The utility model is described in further detail below by embodiment.

The utility model embodiment:

Accompanying drawing 1 is the positive view of the utility model embodiment.

Accompanying drawing 2 is two rotor slot by the geometric figure that is intercepted with the machine shaft vertical plane.

Accompanying drawing 3 has shown two projections of rotor magnetic pole line on the plane vertical with machine shaft 15.

Among Fig. 1, the 1st, register integral body, the 2nd, character wheel, the 3rd, reduction gearing mechanism, the 4th, stepper motor, the 5th, motor shaft, 6 and 7 is two groups of p-m rotors that are fixed on the

motor shaft

5,8 and 9 is respectively the two group stators corresponding with rotor 6 and 7.

Shown

stator

8 and 9 the geometric configuration projection of rotor slot on the plane vertical with machine shaft among Fig. 2, two rotor slot centers are passed by motor shaft.The stator that wherein constitutes each rotor slot is made up of two parts, and 8 is identical with 9 rotor slot shape, but the relative machine shaft 5 of these two rotor slot is symmetrical arranged.The rotor slot geometric figure of Here it is described two groups of stators is with respect to being to be symmetrical arranged in the coordinate system at center with the machine shaft line.Thus, under the identical again situation of two rotor structures, two groups of motors change, the rotation direction of motor was opposite when stator was worked respectively, and this it will be understood by those skilled in the art that.

Referring to Fig. 3.Because rotor is a permanent magnet, and its magnetic pole or pole line is separately arranged.If be installed in two rotors 6 on the same motor rotation axis and 7 pole line in the same way when overlapping perpendicular to the projection on the plane 15 of rotating shaft, then will produce magnetic interference between two group rotors, the result is the output power that consumes or reduced stepper motor.For eliminating this adverse effect, on machine shaft, fix two p-m rotors 6 and at 7 o'clock, this the two the projection of magnetic pole in the same way (the N utmost point or 8 utmost points) on the rotating shaft vertical plane do not overlapped, between two N utmost points or two S utmost points an angle of cut should be arranged, the angle between promptly described two rotor magnetic pole projection lines.Represent two rotor magnetic pole projection line N1 and N2 among Fig. 3, constituted an angle between it.Experiment shows that this angle is better in about 10-180 degree scope.If the rotor slot of stator be as shown in Figure 2, when being symmetrical arranged with respect to machine shaft, experiment shows that the same magnetic pole projection line angle of cut of two described rotors on the same machine shaft should be between the 80-160 degree.

When one group of stator coil of the above embodiment stepper motor was worked, motor shaft rotated to a direction; During another group coil working, motor shaft can rotate round about.Provide thus one can two-way rotation stepper motor, cause register both can measure power consumption, also can zero clearing.Especially before the qualified after tested back of dispatching from the factory of register, use, the demand of zero clearing is arranged.Carry out zero clearing with this motor and can keep the register precision, and the zero clearing meeting of character wheel dismounting is influenced the precision of register.

Electricity rates when electrical network is busy and not busy are different at present, so produced a problem of how to measure electricity rates.The utility model has adopted two combinations with above-mentioned register to be fixed together, or adopts two above-mentioned registers are installed on same frame, forms double word wheel register, with the different power consumptions of its metering different time sections.Two stepper motors of above-mentioned double word wheel register must be arranged in the Antimagnetic hood that is fixed on the frame.Can measure the power consumption of different time sections with this double word wheel of the utility model register economical and practically, satisfy social needs.

The utility model proposes and a kind ofly can make its character wheel return zero register structure under the register precision situation not influencing.A kind of stepper motor that can select positive and negative rotation as required is provided.Further determined the relative pole orientation of two rotors that the interval is provided with on the motor shaft.Propose to measure the double word wheel register of different price electric weight, and emphasized necessity of Antimagnetic hood.The utility model has been finished the object of the invention.

Claims

But 1, a kind of zero clearing ammeter register with rotating stepper motor, comprise p-m step motor, the register support, reach the counter unit that constitutes by character wheel, rounding wheel, reduction gearing, it is characterized in that: the compartment of terrain is fixed two permanent magnet rotor and two groups of corresponding with these two rotors respectively stator and coils is set on frame in the rotating shaft of described stepper motor, when described two corresponding stator and rotor are worked respectively, the direction of rotation of motor shaft is respectively applied for meter degree and zero clearing; The magnetic pole in the same way of two permanent magnet rotor with the vertical plane of machine shaft on projection line intersect and do not overlap, intersect the angle that constituted in 10-180 degree scope.
2, by the described register of claim 1, it is characterized in that: the geometric figure of the rotor slot of described two groups of stators is with respect to being to be symmetrical arranged in the coordinate system at center with the machine shaft line; Angle between described two rotor magnetic pole projection lines is positioned at 80-160 degree scope.
3, by claim 1,2 described registers, it is characterized in that: two described registers of installing on same frame, or two described registers are one by the frame secure bond, available two registers measure the power consumption of different time sections respectively.
4, by the described register of claim 3, it is characterized in that: described two stepper motors are positioned at same or two antimagnetic shells.