JPS63107495A - Operation controller for motor - Google Patents

Abstract

PURPOSE:To average the life and the wasting time of articles of consumption by equalizing the accumulated operation time of a motor. CONSTITUTION:Two of three motors 1 are necessary in operation for the same utility. The other one is used as a spare. The operation and the stop are executed by turning ON, OFF a breaker 2. The average accumulated operation time of the motors 1 and the accumulated operation time of each motor 1 are calculated by a comparison calculator 3. The accumulated operation time of each motor 1 is calculated by a calculator 5 under the condition that the closing contacts 4 of the breakers 2 are closed, and the average operation time is calculated by a calculator 6. Then, a deviation between the accumulated operation time of the motor 1 and the average operation time is calculated by a calculator 7. Two motors which have larger deviations at negative side are selected and signals are generated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the operation control of a group of multiple electric motors used for the same purpose, and particularly to the operation of electric motors suitable for eliminating the cumulative operating time difference between each electric motor. Regarding a control device.

[Conventional technology]

The conventional electric motor operation control device has branch number 82-7354.
As described in , the operation control was such that the motor was switched between regular use and standby use in order to reduce the capacity of the transformer. However, no consideration has been given to averaging the cumulative operating times by controlling the operation by comparing the cumulative operating time of each motor with that of other motors.

[Problem that the invention seeks to solve]

When there are multiple electric motors used for the same purpose and the number of motors to be operated is arbitrarily selected depending on the situation, this operation control has traditionally been left to the operator's judgment, so the cumulative operating time is averaged. However, there was a problem in that only certain motors were operated for long periods of time, resulting in loss of service life and faster wear of consumables compared to motors that operated for short periods of time.

An object of the present invention is to provide a device that controls the operation of electric motors so as to average the cumulative operating time of each electric motor.

[Means for solving problems]

The above purpose is to average the cumulative operating time of each motor,
This can be achieved by comparing the average value with each cumulative time, and giving priority to controlling the operation of the motor that has a negative deviation for a certain period of time or more.

[Effect]

The control device accumulates the operating time of all machines and constantly compares the average operating time to calculate the average operating time of each motor with the cumulative operating time of each motor.If there is a deviation of more than a certain time, the control device starts operation. control. As a result, the operating conditions are satisfied for negative deviations, and the operating conditions are not satisfied for positive deviations, thereby making it possible to average the operating time.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows an example of three electric motors 1 for the same purpose.

Of these, two need to be operated. The other one will be used as a backup aircraft. To stop operation, turn circuit breaker 2 ON and OFF
It is done by doing.

FIG. 2 shows a comparator 3 for comparing and calculating the average cumulative operating time of an electric motor with the cumulative operating time of each electric motor. Closing contact C of each circuit breaker
The cumulative operating time of each electric motor is calculated by the calculator 5 under the conditions of BI to CB3.4, and the average operating time is further calculated by the calculator 6. Next, the computing unit 7 calculates the deviation between the cumulative operating time and the average operating time of each electric motor. The two devices with larger deviations on the negative deviation side are selected and a signal is issued.

FIG. 3 is an example of a circuit breaker closing control circuit. When the automatic closing command 8 is issued and the operation switch is in the automatic position 9, Ml and M2 are calculated by a comparison calculation device for the cumulative operating time of the motor.
If it is determined that the deviation of the cumulative operating time of the motor is large on the negative deviation side, the CBI operation command MSI, 10 and CB2
The contact point of operation command MS2゜10 operates the motors ONLMI and M2.

〔Effect of the invention〕

According to the present invention, it is possible to equalize the cumulative operating time of the electric motors, which has the effect of equalizing the life span and the consumption time of consumables.

[Brief explanation of the drawing]

FIG. 1 is a single-line connection diagram of an embodiment of the present invention, FIG. 2 is a comparative explanatory diagram of cumulative operating time, and FIG. 3 is a circuit diagram of a circuit breaker closing control circuit. DESCRIPTION OF SYMBOLS 1... Electric motor, 2... Circuit breaker, 4... Closing contact of circuit breaker, 8... Automatic closing command, 9... Automatic operation switch, 10... Driving command.

Claims (1)

[Claims] 1. In a group of multiple motors for the same purpose, in equipment where the number of operating motors is arbitrarily selected, calculate the average value of the cumulative operating time of each motor, and determine if the negative deviation of the average time is greater than a certain value. 1. An operation control device for an electric motor, characterized in that a control circuit is provided to give priority to operation of the motors, thereby averaging cumulative operating time differences between the motors.