JPS6062888A - Brake device of motor - Google Patents

Abstract

PURPOSE:To prevent a 3-terminal control element from damaging by interrupting the energization of a main winding and an auxiliary winding for the prescribed period form when a motor stop signal is inputted, thereby reducing a rush current. CONSTITUTION:A calculator 20 controls switching circuits 21, 22 and switching circuits 33, 34 on the basis of a signal (ZVS) synchronized with the zero crossing point of an AC power source inputted from a ZVS measuring unit 18 and a motor stop signal, and further controls 3-terminal control elements 12, 14. After the motor stop signal is inputted, a display unit 19 is provided to interrupt the energization of a main winding 13 and an auxiliary winding 15 for the prescribed period. Then, a current of one direction is flowed to the windings 13, 15 synchronously with once per twice of the ZVS and a braking is performed. At this time, the rush currents of the both terminal control elements 12, 14 can be reduced. Thereafter, a current is flowed only in one direction only to the winding 15 synchronously with once per twice of the ZVS.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a Tanabata braking device used in a dehydrator or the like.

Conventional configuration and its problems Conventionally, this type of motor braking has been configured as shown in FIG. 1 is the main winding of the motor, 2 is the auxiliary valley wire, 3 I; i is the J phase capacitor, 4 is the intermediate tap connected to h11 auxiliary winding 2; The following 1, 1J replacement end f-6 was lost.

7 is one terminal of the motor, 8 is an AC power supply connected to the motor capacity terminal, and switch 9 connects the AC N source 8 t IJJ exchange 13 At terminal 6, Alui L1, ;':
:a - f Can be followed by 7 once.

In the above configuration, switch 9 is set to Il when the motor is running.
Connect to the a-coupler Y and directly apply AC power 8 to the motor. For motor braking 11, connect switch 9 to switching terminal 6, and apply j:ru゛1' waveta to part of main winding 1 and Urasuke winding 2 to diode 5. , the motion of the motor's rotor was converted into electrical energy, generating a buzz.

However, due to this configuration, the brake is not very effective, and it takes a considerable amount of time for the motor to come to a complete stop.

OBJECTS OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a motor braking device that has a strong braking force and can quickly stop the rotation of the motor.

Structure of the Invention In order to achieve the above object, the present invention includes a first three-terminal damping element connected to the main winding of the motor, a second three-terminal control element connected to the auxiliary winding, and a first three-terminal damping element connected to the main winding of the motor. A switching circuit that supplies a signal to the gate ψ of the second three-terminal control element that is synchronized once every two times with respect to the zero volt cross point of the AC power source, and 3lI: a delay device that turns off the fj child control element a11, and the switching circuit controls the braking amount IF: '/) - lip 1 constant 1j, after a period of '1, the second three-terminal control element is turned off. Game!・The signal is supplied to the terminal to brake the motor.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In Fig. 2, 11 is an AC power supply, 12 is a first three-A1, single-child control element connected to the main winding 13 of the motor, and 14 is a second control element connected to the auxiliary winding 16 of the motor. The three-terminal control element 16 is an L-phase capacitor.

17 is the microcombi 5,-ta, and the ZVs word 1 measuring section 18. Calculate delay device 1°'1°19+'6'f
;i 20° switching circuit 21.22'4-
There is c. ZvS measurement section 1a); J, synchronized with the zero volt point of the AC power source/koshin (hereinafter referred to as ZvS)
4 measurements are also o-'c', 6y,. performance) r) place J,! 1
! The section 2o performs arithmetic processing to be described later on the output of the z v s q1 sub-section 18, that is, the ZVSO number, and controls the subsequent switching circuits 21 and 22. 1. When the delay device 19 starts braking, the output of the switching circuit 21.22 is output from the processing section 2o to the switching circuit 21.22 after a period of 116 seconds after the start of braking. The output ψ1111 of the switching circuit 21 is connected to the base of a transistor 24 whose emitter is grounded via a resistor 23, and the collector Qj of this transistor 24 is connected via a resistor 25 to a51 no 3☆;111
It is connected to the gate of the child control element 12. C1. b・
, the base of the transistor 24 is connected to a constant voltage source 27 via resistors 23 and 26. Similarly, the output terminal of the switching circuit 22 is connected to the base of a transistor 29 whose emitter is grounded via a resistor 28, and the collector of this transistor 29 is connected via a resistor 30 to a second terminal. Ill" is connected to the gate of the three-terminal control element 14.

Note that the base 1. of the transistor 29 is J,] to 8 is connected to a constant voltage source 32 via 31. '1°, 33 and 34 respectively indicate switching circuits.

To explain the operation in the above configuration, when the motor is operated, the output terminal of the switching circuit 21 becomes Hi level, the transistor 24 is turned on, a gate signal is input to the gate of the first three-terminal control element 12, and the first The three-terminal control element 12 becomes conductive, and the main -8 wire 13 is energized. On the other hand, the output terminal of the switching circuit 22. level, the transistor 29 is turned off, the gate i of the second three-terminal control element 14 is not gated, the second three-terminal control element 14 becomes non-conducting, and the auxiliary winding 15
Are you familiar with it? Not lied. In this way, the main winding 13 is energized, and the sleeve support wire 15 is not energized, so that the motor rotates in the normal state.

Next, the method of stopping the motor will be explained with reference to Figures 3I-S3. When the motor stop signal 13 'l; is input to the arithmetic processing unit 20, the output of the delay device is input, and the output terminals of the switching circuit 21 and 22 are connected to the knobs 1 and 111. , No. 417, which is at Lo level, is output to each switching circuit 21 and 22. The output of this notching circuit 21 and 22 is 1.1. level, the transistors 24 and 29 are connected to each other (7, first three-terminal control element i2:l
l, ・Yohi The second pressure end r control town Akebono 4-J'14 becomes non-conductive, and the main 6 wire 13;l;-,1,'hi (IN auxiliary winding 151/Cif: is not energized. Delay tribe 1
Main winding 13 and auxiliary winding 16 by i'i', 19
When the power is cut off for a predetermined period of time, the
1.・Now, set the ZVS's A to 0. Next, in Sudesozo 36, it is judged whether or not ZVS has been input, and when ZVS is manually input, the i9A of ZVS is 1 in the next step 7 block 37.
shall be.

Thereafter, the ZVSO number A is increased by one in the same manner. Next, in step 38, it is determined whether the ZVSO number A is an even number or not, and if the number A is an even number, the power supply to the main winding number 13 and the auxiliary winding 15 is cut off. That is, the switching circuit 21.2
The output terminal of No. 2 is set to L0 level. If the number A is an odd number, in the next step 39, it is determined whether the number A is larger than an arbitrary set number X. When iA of ZvS is smaller than the error constant X, that is, in the initial case, the switching circuit 21° 22
Set the output terminal to H level and energize -C main 8 wire 13 and auxiliary winding 15. When the transmission A becomes larger than the set number X, the output terminal of the switching circuit 21 is set to L0 level to cut off power to the main winding, and the output terminal of the switching circuit 22 is set to Hi level to supply power to the auxiliary winding 15. .

In the explanation of the above operation, after the motor stop signal is input, the delay device 19 delays the main winding 1 for a predetermined period of time.
The reason for cutting off the power supply to 6 is as follows.

That is, as shown in FIG. 4, the voltage 12a applied to the motor stop signal and the voltage 14. applied across the second three-terminal control element 1.4. The phase difference t of a.

is large, and until this phase difference t0 becomes small (a predetermined time), the output terminals of the switching circuits 21 and 22 are kept at Lo level, both positive terminal control elements 12 and 14 are turned off, and after a predetermined time, the phase difference t0 becomes small. After the voltage becomes small, the gate 1 (
iA can be input, and b can be input to both three ψW control elements 12 and 14.
;1] The plunge type 1J11X can be made smaller.

In this way, in this embodiment, I:J, the motor (after 7,'% stop signal is input manually) 9j i time, energization to 3N13 and auxiliary winding 16 is cut off, and then Braking is performed by applying a unidirectional current to the main winding 13 and the auxiliary winding 16 in synchronization with every two times of ZvS, and the flesh pressure Q11 of this 11, T
The rush current to the quintuplet control elements 12 and 14 can be reduced.

Thereafter, ZvS is rotated once every two times to apply only one direction to the auxiliary winding 16 for further braking.

In the above embodiment, a half-wave current is passed through the main winding 13 for a certain period of time after a predetermined time after the motor stop signal is input, but the half-wave current to the main winding 13 is It may be kept running all the time, or it may not be run at all. By the way, the time until the rotation stops in the case of the conventional example and the cases in which the half-wave current is passed through the main winding 13 for 0 seconds, 12 seconds, 16 seconds, and all the time, and the main winding 13, The results of the temperature rise values of the winding 15 are shown in the table below.

In the embodiment shown in FIG. 2, C-1 and switching circuits 33,34)'f are provided, but the output terminal of the switching circuit 21 and the first three ψ;1. ; child control iIl + gate of element 12; and -C are connected through a resistor, and similarly switching circuit 220 output ψ; 1.1 child and second three ☆; 1.
The gate of the one-child Jilil element 14 is
Continuation - C too": Yes.

According to the present invention, the motor stop signal > y is human power, J') 1.
'; During JI II'J, cut off the power to the main winding and auxiliary winding 10, then 1st and 8r! Even if the gate 15 synchronized with the zvS once every two times is supplied to the three-terminal control 1111 element of 2 at the same time, the inrush type 6fi, &:
i small three ends r restraining element''6 break j force, -
1, three ends: r-control all J-t-1tC &: I, Z
Gate 1 synchronized with V S o 2 L+DJ once
5. 0 (supplied, so the auxiliary winding &:J:'
The l'-wave current is 1) ii, 711. ±−Efficient braking is possible.

[Brief explanation of drawings]

Figure 1 shows the li! of a conventional motor. Figure 2 is an electric circuit diagram of the braking device of the i+::-J- motor, and Figure 3 is an electrical circuit diagram of the braking device of the motor. FIG. 4 is a diagram showing the flowchart 1 by the control n11 of the microcomputer, and is a voltage waveform diagram at both ends of the three Vl11j child control elements -t of the same electric circuit. 12... First three-terminal control element, 13... Main winding, 14 Second three-terminal control element, 16- Auxiliary winding,
19. Delay device, 21.22 - Switching circuit. Name of agent Patent attorney Nakao 11 tickets Male 1 person Figure 1 Figure 3 Figure 1 Figure υ 11◆fJ(lI)-

Claims (1)

[Claims] and a second three-terminal control element connected to the auxiliary winding, and a signal synchronized once every two times with respect to the zero volt cross point of the AC power source to the gate terminal of the second three-terminal control element during braking. and a delay device that turns off the two three-terminal control elements for a predetermined period of time after the start of braking, and the switching circuit causes the second A motor braking device that supplies the signal to a gate terminal of a three-terminal control element.