JPH0764492B2 - Elevator control equipment - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

The present invention relates to a control device that controls the operation of an elevator, and particularly to a control device of an elevator that performs a power saving operation.

2. Description of the Related Art Conventionally, as a device for reducing the power consumption of an elevator, there is, for example, one disclosed in Japanese Patent Laid-Open No. 57-27876. This is the speed at which the load in the car is detected by the load detection device in the elevator that operates the car at the speed corresponding to the speed command signal, and the speed command signal is generated in response to the load detection signal of the load detection device. It controls the setting device. In other words, the number of passengers in the car is detected as a load, and the maximum speed of the car is changed according to the number of passengers to perform power saving operation.When the number of passengers increases, the maximum speed of the car To reduce power consumption.

[Problems to be Solved by the Invention]

Since the conventional elevator control device is configured as described above, it is mainly effective for high-speed elevators with a rated speed of 240 m / min or more, but a so-called low-speed elevator with a rated speed of 105 m / min or less. Is inappropriate. This is because in a low speed elevator, if the speed is reduced to such an extent that the power saving effect is recognized, the speed becomes very low and the operation efficiency is reduced. As a result, there is a problem that passengers in the car and waiting passengers in the hall feel a frustration. The present invention has been made to solve the above problems, and an object of the present invention is to provide an elevator control device capable of power saving operation without impairing serviceability to passengers and waiting passengers. is there.

[Means for Solving the Problems]

The elevator control device according to the present invention includes means for detecting a call generation interval, means for detecting that the call generation interval exceeds a predetermined time, means for detecting an operation pattern, and a speed command value. Means is provided to generate a speed command value with reduced acceleration only when long floor movement is possible to perform power saving operation.

[Action]

The elevator control device according to the present invention detects that the call generation interval is equal to or longer than a predetermined time, and determines that the operation is in a quiet operation state. Since the acceleration at the time is reduced, power saving operation can be performed without deteriorating the operation efficiency.

Examples of the invention

An embodiment of the present invention will be described below with reference to the drawings. First
In the figure, 1a to 1n are call signals such as car calls and hall calls,
Reference numeral 2 denotes a speed command device that generates a speed command value by performing a calculation by using the call signals 1a to 1n as inputs, and a central processing unit (CPU) 2a and a read only memory (ROM) storing a processing program. 2b, a random access memory (RAM) 2c that temporarily stores various data, an input circuit 2d that captures the call signals 1a to 1n and supplies them to the central processing unit 2a, and an output circuit 2e. . Three
Is a speed control device that controls the rotation of the hoisting electric motor 4 that raises and lowers the car according to the speed command value generated from the speed command device 2. In the elevator control device thus configured,
When a call is generated and the call signals 1a to 1n are supplied, the input circuit 2d provided in the speed command device 2 receives the call signals 1a to 1n.
1n is detected and supplied to the central processing unit 2a. Central processing unit
When 2a receives the call signals 1a to 1n, the call signal is processed by the processing program stored in the read-only memory 2b.
The speed command value is calculated by performing calculations based on 1a to 1n, the count value stored in the random access memory 2c, the previously processed data, and the like. Then, the speed command value obtained by the central processing unit 2a is supplied to the speed control device 3 via the output circuit 2e. Speed control device 3
Controls the number of rotations of the hoisting motor 4 that raises and lowers the car according to the speed command value generated from the speed command device 2. FIG. 2 is a flow chart showing a processing program of the central processing unit 2a constituting the speed command device 2. And
In this flowchart, in step 101, a call is generally generated when the elevator is operated at a high frequency. Therefore, if it is determined that there is a call by determining the presence or absence of this call, step 102 is performed. Move to. In step 102, the timer for measuring the interval between calls is reset and the process proceeds to step 107. In step 107, control during normal operation is performed by generating a speed command having the normal speed command characteristics 5 or 6 shown in FIG. On the other hand, when the number of passengers decreases and the operation of the elevator becomes quiet, the number of calls is reduced. Here, when there is no call, the determination in step 101 becomes NO and the process proceeds to step 103. In step 103, the timer is activated and the process proceeds to step 104. In step 104, it is judged that a new call has occurred, and if the result of the judgment is NO, the operation of returning to step 103 is repeated to continue the timing operation during the period in which there is no call. Then, when a new call is generated, the determination in step 104 becomes yes and the process proceeds to step 105. In step 105,
The call generation interval T is detected by stopping the operation of the timer operated in step 103. Therefore, steps 103 to 105 constitute the call occurrence interval detecting means. Next, at step 106, the call occurrence interval T measured at step 105 is compared with a preset predetermined value T _0, and if the comparison result is T> T ₀ , it is regarded as a quiet time. After that, the process proceeds to step 108. If the relationship between the measured time T and the predetermined value T ₀ is T> T ₀ , it is considered that the elevator is still busy, and the routine proceeds to step 107. Therefore, this step 106 constitutes an off-peak detection means, and 108 constitutes an operation pattern detection means for detecting the operation patterns of the quiet operation and the crowded operation. Next, in step 107, normal operation is executed by generating a speed command having the normal speed command characteristics 5 or 6 shown in FIG. On the other hand, in step 108, it is judged whether or not full speed operation is possible by the operation from the floor where the newly generated call and car are stopped. Here, generally, in a low-speed elevator having a rated speed of 105 m / min, full-speed traveling can be performed by operating two or more floors. In the case of short-floor operation that cannot run at full speed, the operating time is short, so no matter what operation method is adopted, it is impossible to make a great deal of power saving operation. For example, a speed command having a speed command characteristic 6 shown in FIG. 3 is generated as the speed command. If it is determined in step 108 that full speed operation is possible, the process proceeds to step 109 as speed command generating means. In step 109, power saving operation is performed by generating a speed command having the speed command characteristic 7 shown in FIG.
Generally, when the acceleration is reduced, the current supplied to the hoisting electric motor 4 is reduced, so that the copper loss of the electric motor is reduced. Further, when the current supplied to the hoisting motor 4 decreases, the loss of the power converter used in the speed control device 3 also decreases. Further, the low-speed elevator has a shorter acceleration time than the high-speed elevator, and therefore the running time does not increase much even when the vehicle is driven at a reduced acceleration. In particular, when driving a long floor, the full-speed traveling period is longer than the acceleration / deceleration period, so the increase in traveling time due to a decrease in acceleration is slight. It should be noted that, in the above-described embodiment, only the case where the power generation operation is performed by detecting that the call occurrence interval is equal to or longer than the predetermined time has been described, but the start frequency is measured within a certain fixed time, and the start It goes without saying that the power saving operation may be performed when it is detected that the frequency becomes equal to or lower than the predetermined value.

【The invention's effect】

As described above, according to the present invention, by detecting that the call generation interval of the elevator has become equal to or longer than a predetermined time, it is determined that the operation state is in a non-existent state, and a call that enables long floor operation is made. On the other hand, since the acceleration is reduced during full speed operation, there is an effect that power saving operation can be performed without deteriorating the operation efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram showing an elevator control apparatus according to an embodiment of the present invention, FIG. 2 is a flow chart showing the operation of FIG. 1, and FIG. 3 is controlled by the elevator control apparatus shown in FIG. It is a speed characteristic diagram of a car. 1a to 1n are call signals, 2 is a speed command device, 2a is a central processing unit (CPU), 2b is a read only memory (ROM), 2c is a random access memory (RAM), 2d is an input circuit, 2e is an output circuit, 3 is a speed control device, 4 is a hoisting electric motor.

Claims (1)

[Claims] 1. Call generation interval detection means for detecting a call generation interval, off-peak time detection means for detecting that the detected call generation interval exceeds a predetermined time, and full speed operation for the call. A driving pattern detecting means for determining that the distance is possible, and a speed command generating means for generating a speed command value with an acceleration lower than in normal driving when the off-peak time detecting means and the driving pattern detecting means operate. Elevator control device.