JPS5970190A - Controller for motor - Google Patents

Abstract

PURPOSE:To enable to readily and effectively protect a motor against reverse phase state by providing a reverse phase detector and inputting a reverse phase signal as an operation condition data to a controller. CONSTITUTION:An input circuit 15 inputs a circuit current IC and the state detection signals of contact signal S by a starting operation switch and a stopping operation switch to a control circuit 17. The circuit 17 logically judges with a command code stored in a memory 16, the state detection signal from the input circuit 15 and a reverse phase detection signal G from a reverse phase detector 20, and outputs a drive signal. An output circuit 18 controls and protects with the logic output from the circuit 17 the starting of the motor. In this manner, the motor can be readily and effectively protected against the reverse phase state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a motor control device having a controller, and particularly to a control 1gl configuration that protects the motor from application of a negative phase voltage.

Conventionally, a motor control device has various relays such as earth leakage relays and overcurrent relays that perform start, stop, and control, as well as auxiliary relays and operation switches. In order to be able to use the 1g detection circuit, control circuit, output circuit, power supply circuit, etc. of each test device in common, each of these test instruments and circuits are individually wired from 1 to 1. was there. However, with this configuration, there are many wires inside the device, which takes time, is prone to miswiring, and requires the provision of various devices such as relays with different external dimensions.
This has the drawbacks of increasing the cost of the control device and decreasing reliability.

't34''j has already been proposed to eliminate such drawbacks.
The configuration shown in Figures 1 and 2 has been proposed. In Figure 1, (1) is the main circuit (power supply mains), +21 is the wiring jumper, (8) is the electromagnetic switch, and (4) is the electric motor.These elements make up the main circuit section (5). It is configured.

The coil (6a) of the X-ray switch (8) is connected to the control (2) section (7) which is supplied with power via the control power transformer (6) connected to the main circuit section (5). It will be done. The control section in Figure 1 (
In terms of power, (8) is a circuit for detecting accents;
(9) is the controller that controls the ward tower resistance from electric 1 → +io) is the starting extension switch, (lIJ is the stop operation switch, (1 is the operation indicator light consisting of a red lamp,
(No. 13 is a green lamp indicating the stoppage, (No. 4 is an orange failure indicator light.)

Further, as described above, the control section (7) has a controller (9) which is unitized as a main body of the control section, a transformer A (8) that detects the circuit current as an operating condition, and a starting operation. The switch (111, is designed to receive a signal from the stop operation switch UNI, and for control purposes is the coil (3a) of the electromagnetic switch (8), the operation indicator light (agriculture, the tank stop indicator light (181), and the malfunction indicator light). A control signal is sent to the indicator light (141).

In the case of this control device, the controller (9) has a control power supply terminal (9a) which receives power from the control power transformer (6) as input signal terminals, and a configuration terminal (9b) which is connected to the current transformer 18+. ), a start operation detection terminal (9g) connected to the start press switch (tlO), and a stop operation detection terminal (9h) connected to the stop operation switch (11).
and a 'magnetic switch terminal (9C) which is connected to the coil (3a) of the '1 magnetic switch (8) as an output signal terminal.
, operation indicator light (121), stop indicator light (1B), and failure indicator light (indicator light terminal (9d) each connected to one line,
(9e) and (9f), and functionally provides output contacts (91) and (9f) that supply electric power to each output terminal.
j), (9k), and (9C).

As shown in FIG. 2, the internal configuration of the controller (9) includes a circuit current detection signal Ic, a start operation switch (1-9), and a stop operation switch (E) that detects the state of each contact S. An input circuit (161) into which signals are input as operating conditions, a memory circuit (161) in which startup, control, and protection operations corresponding to the input data are programmed and stored in advance; A control circuit t1rO1 and the control circuit (17) that make a logical judgment based on the input data of the input circuit (15) and obtain a drive signal.
An output screen VF6 is provided which is driven by the logic output from the 1st section and performs start-up control and maintenance operations of the extending rock (4).

Next, 'Kamikiniso' according to the configuration shown in Figures 1 and 2 above? To describe the operation of the Ill control device, firstly, when the energizing operation switch (lO) is turned on, the control circuit (controller 7) activates the memory circuit (16) based on the detection of the input circuit (15). The internal command code is read out, and the input data of the input circuit (1B) is read and the logic IJ is disconnected from both data. Sends a signal to turn on the indicator light (121) and stores the operating status in the memory circuit (16).The above output circuit +IB
) Ick, open and close! a (81 no Kakeru! 1t
! By transmitting the I signal and turning on the internal contact (91), the coil (3a) of the X-ray circuit breaker 8) is excited. 1
Start II1 machine (4). At the same time, by turning on the operation display signal and turning on the internal contact (9J), the operation indicator light (12+) lights up. Since this operation status is stored internally, the starting operation switch (1α) is turned off. However, the operation will continue.

Second, in such an operating state, when the stop operation switch (11) is turned off, the input screen u (151) detects each contact number, and based on this, the control circuit (17) Take out the internal ejection code, insert the entire data of the input circuit (15), and print it from the JiI + Ministry's data to output image 1113 (input the affirmative display name in 181 and display the operation display. Stop the signal and the drive signal for the electromagnetic switch.

At the same time, the operating state stored in the memory circuit (16) is reset.At this time, the output circuit (direction) turns off the internal contact (9j), turns off the operation indicator light 121, and turns off the internal contact (9k).
) to turn on the stop indicator light (18), turn off the internal contact (91), release the excitation of the coil (5a) of the electromagnetic switch tal, and turn on the switch (4). Stop.

Thirdly, in the above-mentioned operating state, the king circuit (5
) and electric motor (L4), when an overload state J or electric current Ic occurs, the input circuit (period) detects the current Ic of that circuit, and based on this, the control circuit (17) Circuit (+
Extract the internal life code of 61 and input the image t@t15
The data of J is read and a logical judgment is made based on both data to determine a failure state. Then, the memory of the operating state in the memory circuit (16) is reset and the failure state is newly stored. .

In addition, the output circuit 118) shows failure display 1g and stop display 1.
At the same time as sending the signal g, the drive signal for the value switch is stopped at the operation display number. At this time, the output circuit (the concave part is the internal contact (
9j), turn off the operation indicator light (old), and turn off the internal contact (
At the same time, the internal contact (91) is turned off, the coil (6a) of the IL switch (8) is deenergized, and the motor (4) is stopped.

As mentioned above, the inputs 1d such as start, stop, overcurrent maintenance, and -ton protection are logically processed by the instruction code of the memory circuit α6), and all signal processing outputs are performed inside the controller (9). . Furthermore, by changing the instruction code stored in the circuit (16), it is possible to obtain a negative output without changing the external circuit at all.

You can protect yourselves from earthquake disasters by holding your sleeves.

The electric rJJJ Iso control device according to Fig. 1.2 is configured as described above, and if some abnormality occurs, the electric rJJJ
Even if a negative phase voltage is applied to the motor (4), the negative phase abnormality cannot be detected and the electric motor (4) may be destroyed.

The present invention has been made in order to eliminate the above-mentioned drawbacks, and the present invention has been made in order to eliminate the above-mentioned drawbacks. By providing a negative phase detection circuit that sends a negative phase signal as data to the controller, and having the controller perform a protection operation for negative phase No. 1g, it is possible to easily prevent negative phase abnormalities with an inexpensive structure. The purpose of the present invention is to provide a turtle wh rock control device which can also reliably protect electric currents, rocks, etc.

Hereinafter, a description will be given of Fig. 3.4, in which the same parts as in Fig. 1.2 are denoted by the same reference numerals, showing one aspect of the present invention. Third
In the figure, (1ω is a control transformer for negative phase detection, (2)
) is a negative phase detection circuit. In other words, the three-phase voltage of the main circuit (6) is transformed through a transformer (to) and supplied to a negative phase detection circuit (to) connected to its secondary side.

The negative phase detection circuit (sub) determines whether or not the main circuit's 34U゛1 voltage is in reverse phase from the supplied A@voltage, and only if it is in reverse phase, outputs the negative phase No. 15 G to the 4th figure. Controller as shown (9)
control circuit (input to lη. At this time, supply circuit a7)
reads the internal command code for continuous phase operation which is programmed in advance in the memory circuit (+6), and compares this internal command code with the state detection signal etc. from the input circuit of5) to make a decision Wr. . If it is determined that there is a negative phase abnormality in this phase and the motor etc. should be stopped, the control circuit t17
) turns off the output circuit (G) to turn on the stop indicator light side, and turns off the operation indicator 4 埒.

Sends out a drive signal to open the electromagnetic switch (8). In this way, 'FIL!' for reverse phase abnormality! II
IJa etc. are protected.

The operation in response to a negative phase abnormality has been described above, but the starting operation, stopping operation, and axis-holding operation in response to an abnormality such as overcurrent in the illustrated embodiment are similar to the operation of the conventional device shown in FIG.

It should be noted that in the illustrated embodiment, the negative phase detection circuit □□□ may be separate from the controller (9) or may be integrated. Furthermore, it is clear that in order to monitor the reverse phase state of a large number of units, it is useless to display signals related to the reverse phase state in a cluster.

As described above, according to the present invention, the '1 drive control system is configured by adding a negative phase detection circuit to the control device shown in Figures 1 and 2, so it is easy to use with an inexpensive intermediate wheel configuration. Moreover, it has the effect of being able to reliably maintain the cough from a reverse phase state.

[Brief explanation of drawings]

Figures g'1 and 2 relate to the electric WJ+IK system that has already been proposed, with Figure 1 being a circuit diagram and Figure 2 being a 4-function block diagram. Figures 3 and 4 are related to a control device according to one embodiment of the present invention and another example, Figure 3 is a circuit diagram, and Figure 4 is a circuit diagram.
The figure is a functional block diagram. (1)・e Main circuit power supply #(8)・・Electromagnetic switch (4
)...'Electric motor (6), song)...Transformer t8
1--Current transformer (9)...Controller 115
) +1・Input circuit (16)・Φ memory circuit (Shikenyu control circuit (old)・・Output circuit @)・・Negative phase detection circuit′ In the figures, the same reference numerals indicate the same − or equivalent parts. Agent vb Haku No - Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] A controller is provided to control power supply to a motor connected to the main circuit power bus through an electromagnetic switch, a current transformer, etc., and the controller receives a detection signal from the current transformer and performs start and stop operations. An input circuit that inputs various state detection signals such as contact point I= from a switch as operating condition data, and a storage circuit that programs and pre-stores each activation, control, and protection operation corresponding to the data with instruction codes;
A control circuit which disconnects the logic 4'lJ and obtains the work signal No. 1 according to the instruction code of the memory circuit and the input data of the input circuit;
In the car shuffle machine control device 4, which is driven by the control circuit and is configured with an output circuit that performs start control and maintenance W1 operation of the electric train, the three-phase voltages to the electric motor are in reverse phase. A reverse phase detection circuit is provided to detect and send a reverse phase signal as operating condition data to the controller, and the controller is configured to perform a protective operation against reverse phase abnormality based on the reverse phase No. 18. Electric motor control device.