CN208091608U - The detection device of motor cogging torque - Google Patents

Abstract

The utility model discloses the detection devices of motor cogging torque, the torsiometer being connect with tested motor input terminal including output end, further include bearing, the first mounting base, the transmission mechanism of output torque, the second mounting base, first mounting base and the second mounting base may be contained on bearing, transmission mechanism is mounted in the first mounting base, torsiometer is mounted in the first mounting base, and the output end of transmission mechanism is fixedly connected with the input terminal of torsiometer.The utility model can accurately go out the cogging torque of motor.

Description

The detection device of motor cogging torque

Technical field

The utility model is related to technical field of motors, and in particular to a kind of detection device of motor cogging torque.

Background technology

The cogging torque of motor is the reluctance torque of the tooth socket and rotor permanent magnet interaction and generation of armature core.By In the presence of motor stator tooth socket, when rotor magnetic pole it is opposite with stator tooth socket in different location when, the magnetic conductance of main magnetic circuit has occurred Variation.Even if machine winding no power, due to the effect of cogging torque, rotor, which has, stops circumferentially several settling positions On trend.So there is document that cogging torque is known as location torque again.When motor rotates, cogging torque shows as one kind Additional pulsating torque, although it will not make motor, average effective torque increases or decreases, it causes velocity perturbation, motor to be shaken Dynamic and noise, especially seems more obvious in light load and low speed.In variable speed drives, if the frequency of cogging torque connects There may be resonance and intense noise for nearly system fixed frequency.In addition, at the start, since the presence of cogging torque needs to increase Initial starting torque, this is just more sensitive for some sensorless strategy modes；Direct-drive motor is then influenced most Low priming speed.For single-phase permanent brushless motor, excessive cogging torque even prevents motor from normal starting.

Therefore, it is necessary to the cogging torque sizes to motor to be detected.Existing detection mode is, with torsiometer and motor After connection, torsiometer is manually directly rotated, motor rotation is driven by torsiometer, the value shown on torsiometer is i.e. For cogging torque value.Aforesaid way the problem is that, manually rotation when rotating speed it is uneven, can make motor generate effect of inertia Power causes the rotating speed of motor too fast, generates larger inertia, causes detection inaccurate.On the other hand, hand is pressed on torsiometer When, axial pressure is generated to motor indirectly, increases the frictional force of rotor bearing, increases rotary resistance, also leads to detection not Accurately.In addition, artificial detection efficiency is low.

Invention content

The purpose of this utility model is to provide a kind of detection devices of motor cogging torque, and the utility model can be accurate Go out the cogging torque of motor.

The technical solution for solving above-mentioned technical problem is as follows：

The detection device of motor cogging torque, including torsiometer that output end is connect with tested motor input terminal further include Bearing, the first mounting base, the transmission mechanism of output torque, the second mounting base, the first mounting base and the second mounting base are respectively provided with In on bearing, transmission mechanism is mounted in the first mounting base, and torsiometer is mounted in the first mounting base, the output end of transmission mechanism It is fixedly connected with the input terminal of torsiometer.

The active force of rotation is passed to torsiometer by the utility model by the transmission mechanism in the first mounting base, It is such the rotary speed unstabilization of motor to be made fixed and generate inertia the advantage is that the active force of transmission mechanism output is controllable, Therefore, the accuracy of detection can be promoted.Another party and, torsiometer is fixed in the first mounting base, and therefore, torsiometer is to tested Motor does not have pressure effect, avoids the frictional force for increasing rotor bearing, prevents from increasing rotary resistance, therefore, it is possible to ensure to examine That surveys is accurate.In addition, the detection device of this structure assembly by motor after, only to quickly detect corresponding cogging torque, Have the advantages that detection efficiency is high.

Description of the drawings

Fig. 1 is the structural schematic diagram of the detection device of the motor cogging torque in the utility model；

Fig. 2 is the side view of Fig. 1.

Specific implementation mode

As depicted in figs. 1 and 2, the detection device of the motor cogging torque of the utility model, including output end and tested electricity The torsiometer 1 of machine input terminal connection further includes shaft coupling 2, bearing, the transmission mechanism of output torque, the first mounting base, the second peace Seat is filled, the relationship to each section and between them is described in detail separately below：

As depicted in figs. 1 and 2, bearing includes pedestal 3 and multiple columns 4, and one end of column 4 is fixed on the base 3, stood The cross sectional shape of column preferentially by positioned at middle part rectangle and be incorporated in the semicircle at rectangle both ends and form, the quantity of column 4 is excellent First use 4, the mode that column 4 is preferentially connected through a screw thread is fastened with pedestal 3, can also using weld by the way of and bottom Seat is fastened.

As depicted in figs. 1 and 2, the first mounting base and the second mounting base may be contained on bearing, first mounting base 5 It is arranged on column with the second mounting base 6.First mounting base 5 is equipped with axial first through hole, and the second mounting base 6 is equipped with axis To the second through-hole, first through hole and the shape of the second through-hole and the cross sectional shape of column are adapted.

As depicted in figs. 1 and 2, column 4 passes through the in the first through hole and the second mounting base 6 in the first mounting base 5 Two through-holes, in this way, column 4 and the first mounting base 5 and the second mounting base 6 form clearance fit, to, the first mounting base 5 with And second mounting base 6 can be along the axial movement of column.In order to which the first mounting base 5 and the second mounting base 6 to be fixed, The side of one mounting base 5 be equipped with the first radial screw bore, the side of the second mounting base 6 be equipped with the second radial screw bore, first First bolt is installed in radial screw bore, the second bolt is installed in the second radial hole.When the first mounting base 5 is moved as needed When moving suitable position, counter-active effect power is formed by the first bolt and column 4, the first mounting base 5 is located on column 4. When the second mounting base 6 is moved to suitable position as needed, counter-active effect power is formed by the second bolt and column 4, by the Two mounting bases 6 are located on column 4.

As depicted in figs. 1 and 2, the space of assembly tested motor A is formed between the second mounting base 6 and bearing.Preferably, Second mounting base 6 forms the tested electricity of assembly between the first mounting base 5 and pedestal 3 between the second mounting base 6 and pedestal 3 The space of machine A, the second mounting base 6 are equipped with the second axis hole, output end or shaft coupling 2 of second axis hole for tested motor A End pass through.

As depicted in figs. 1 and 2, the output end of transmission mechanism is fixedly connected with the input terminal of torsiometer 1.Transmission mechanism is installed In the first mounting base 5, the transmission mechanism includes driving motor 7, train of reduction gears, and driving motor 7 is fixed on the first installation On seat 5, driving motor 7 preferentially uses stepper motor, and the axial direction of the output end of driving motor 7 is parallel with the axial direction of column 4, driving Motor 7 is preferentially fixed on the lower surface of the first mounting base 5, is equipped with the first axis hole in the first mounting base 5, driving motor 7 it is defeated Output shaft is connect across the first axis hole with train of reduction gears.Train of reduction gears includes first gear 8 and second gear 9, and first Gear 8 is intermeshed with second gear 9.First gear 8 is fixed on the output end of driving motor 7, second gear 9 and torsiometer 1 Input terminal be fixedly connected.

As depicted in figs. 1 and 2, torsiometer 1 is mounted in the first mounting base 5, it is preferable that the torsiometer 1 is fixed on the The lower surface of one mounting base 5, train of reduction gears are located at the top of the first mounting base 5, and the input terminal of torsiometer 1 passes through the first installation It is fixedly connected with the second gear after seat.Preferably, the transmission mechanism further includes bearing 10, the input of the torsiometer 1 End is fixedly connected after bearing 10 with second gear 9.The input terminal of torsiometer 1 is radially constrained by bearing 10, it can The input terminal of torsiometer 1 is avoided to swing.

As depicted in figs. 1 and 2, the output end of the torsiometer 1 is connect with one end of shaft coupling 2.The other end of shaft coupling 2 It is connect with the output end of tested motor A.

As depicted in figs. 1 and 2, when in use, tested motor A is placed on the base 3, by adjusting the second mounting base 6 Position, mobile second mounting base 6 makes the output end of tested motor A pass through the second axis hole in the second mounting base 6, passes through second Second mounting base 6 is locked on column 4 by bolt, and tested motor A is clamped between the second mounting base and pedestal 3, to Positioning action is formed to tested motor A.Starting driving motor 7, the torque that driving motor 7 exports drives train of reduction gears rotation, The active force of rotation is transported to torsiometer 1 by train of reduction gears, and power is delivered to tested motor by torsiometer 1 by shaft coupling 2 A makes tested motor A rotate, to show cogging torque value on torsiometer 1.Often give the arteries and veins of 7 one steppings of driving motor Punching, then show a cogging torque value on torsiometer 1.

Claims (9)

1. the detection device of motor cogging torque, including torsiometer that output end is connect with tested motor input terminal, feature exist In, further include bearing, the first mounting base, the transmission mechanism of output torque, the second mounting base, the first mounting base and the second installation Seat may be contained on bearing, and transmission mechanism is mounted in the first mounting base, and torsiometer is mounted in the first mounting base, transmission mechanism Output end be fixedly connected with the input terminal of torsiometer.

2. the detection device of motor cogging torque according to claim 1, which is characterized in that the transmission mechanism includes driving Dynamic motor, train of reduction gears, driving motor are fixed in the first mounting base, and train of reduction gears includes first gear and the second tooth Wheel, first gear are fixed on the output end of driving motor, and second gear is fixedly connected with the input terminal of torsiometer.

3. the detection device of motor cogging torque according to claim 2, which is characterized in that the transmission mechanism further includes The input terminal of bearing, the torsiometer is fixedly connected after bearing with second gear.

4. the detection device of motor cogging torque according to claim 2, which is characterized in that the torsiometer is fixed on The lower surface of one mounting base, train of reduction gears are located at the top of the first mounting base, and the input terminal of torsiometer passes through the first mounting base It is fixedly connected afterwards with the second gear.

5. the detection device of motor cogging torque according to claim 1, which is characterized in that further include shaft coupling, it is described The output end of torsiometer and one end of shaft coupling connect.

6. the detection device of motor cogging torque according to claim 1, which is characterized in that bearing includes pedestal and more One end of a column, column is fixed on the base, and first mounting base and the second mounting base are arranged on column.

7. the detection device of motor cogging torque according to claim 1, which is characterized in that in the second mounting base and bearing Between formed assembly tested motor space.

8. the detection device of motor cogging torque according to claim 7, which is characterized in that be equipped in the second mounting base Second axis hole.

9. the detection device of motor cogging torque according to claim 1, which is characterized in that driving motor is stepping electricity Machine.