KR20000049335A - Multi-Function Motor Controller - Google Patents

Abstract

PURPOSE: A multi-functional motor controller is provided to display the state of a motor and control the motor in a remote control and facilitate the operation of the motor. CONSTITUTION: A multi-functional motor controller comprises a display section(14), a switch input section(40), a communication protocol connecting section(42), a memory section(46), a CPU(48), a timer(49), an A/D converter(50), a high speed relay(52), an AC/RMS converter(56,57,58), a wave forming section(60), a relay section(61,62,63,64.,65), a parallel processing section(66), a controller power supplying device(67), a terminal block(68), a control panel(10), and a fuse(26). The CPU(48) outputs control signals for controlling a motor. The fuse(26) intercepts the inrush current which is generated by a over voltage.

Description

Multi-Function Motor Controller

The present invention relates to a multi-function motor controller, and more particularly, to a multi-function controller that controls the driving of a motor. The multi-function motor controller detects and displays a reverse phase or phase loss of the motor, an overcurrent or ground current, or a motor for driving or controlling the motor. It is about.

The motor converts electrical energy into mechanical energy. When electrical energy is applied to a stator in which a coil is wound in the motor, a rotor configured inside the stator generates a rotational force by a magnetic field of the coil.

The motor controller controls power applied to the motor by a predetermined method, and the motor controller includes various functions for controlling the motor.

Conventionally, a separate current transformer is not installed in a unit for driving a motor having an output of predetermined horsepower, for example, 50 horsepower or less. Current transformers are current transformers that change the current within the range of use of the measuring instrument when measuring alternating current.

As described above, functions or devices for controlling the motor are independently installed, and thus separate and separate facilities are required to detect or control reverse phase, phase loss, overcurrent, or ground current of the motor.

In addition, there is a problem that it is difficult to protect the motor against a sudden overcurrent even when the motor is not continuously operated or is operated again when the power is restored again after a momentary power failure occurs during the operation of the motor.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a multifunctional motor controller for detecting and displaying an abnormal state of the motor during operation of the motor or for setting and controlling the operating conditions of the motor.

In addition, communication facilities are connected to monitor and control a plurality of motors remotely in a control center that controls the motor, and the driver can easily recognize the motor's reverse phase, phase loss, overcurrent or ground current. The purpose is to make it easy to set the operating conditions in the control panel.

1 is a block diagram of a multifunction motor controller according to the present invention;

2 is a control panel of the multi-function motor controller according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: Control panel 11: Remote control setting display lamp

12: set button

14, 40: display part 15: 7-segment

16: increase / decrease button part 21: timer setting part

22: (Y) Connection status display lamp 23: (Δ) Connection status display lamp

24: Time setting (off) status display lamp 25: Time setting (off) status display lamp

26: fuse 27: manual / auto mode setting button

28: Manual mode indicator lamp 29: Auto mode indicator lamp

30: OFF button 31: OFF status display lamp

32: On button 33: On status display lamp

34-37: Fault status indicator 38: Reset button

39: test button 42: switch input

44: communication protocol connection 46: memory

48: CPU 49: Timer

50: A / D converter 52: high speed relay

56-58: AC / RMS converter 60: Waveform shaping unit for reverse phase / phase detection

61-65: relay unit 66: external automatic contact parallel processing unit

67: controller power supply 69: terminal block

In order to achieve the above object, the present invention provides a display unit for displaying the setting and operation state of the control of the motor, a switch input unit having a plurality of input buttons, a communication protocol connection unit for transmitting and receiving data to and from the outside, and various kinds of data. And a CPU for outputting a control signal for controlling the motor by calculating and determining an input signal, a timer for counting a predetermined time, an A / D converter for converting an analog signal into a digital signal, A high speed relay for switching the applied signal at high speed, an AC / RMS converter for converting AC power into a square root of the root mean square value (RMS), and a reverse phase / phase detection waveform for detecting a reverse phase or an open phase of the motor It is equipped with a shaping part, a relay part for driving a motor, an external automatic contact parallel processing part which processes an external automatic contact in parallel, and a controller It provides a controller power supply for supplying a coin source, a terminal block to which a motor is connected, a control panel for controlling or displaying an operating state of the controller, and a fuse for blocking inrush current due to an applied overvoltage. This can be achieved by.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a multifunctional motor controller according to the present invention, and FIG. 2 is a control panel diagram of the controller.

The display unit 14 displays a setting or operation state related to the control of the motor, and a plurality of 7-segments 15 may be configured or an LCD or the like may be applied. In addition, the display unit 14 includes display means (light emitting diodes) capable of displaying inputs, settings, and the like required for driving the motor.

The switch input unit 42 is composed of a plurality of input buttons, and consists of a group of switches for starting, stopping or controlling the operation of the motor.

The communication protocol connection unit 44 matches the protocol input and output to a communication port capable of transmitting and receiving data for monitoring and controlling the motor from a remote location. Here, the communication protocol connection unit 44 may be configured by wire or wirelessly, and includes a connector 45 for connecting a communication protocol capable of connecting a cable.

The memory unit 46 stores various kinds of data. The data related to the control of the motor is set, and the input data may be stored as necessary. In addition, the memory of the memory unit 46 is a non-voltage memory is used that can maintain the stored data even if the voltage required for driving is cut off.

The CPU 48 calculates and determines an input signal and outputs a control signal for controlling the motor. The CPU 48 includes a control signal for controlling the motor or controls an input condition. It is preferable to use one.

The timer 49 counts a set predetermined time, and the timer 49 allows time setting necessary for driving of the built-in electronic component and various counts.

The A / D converter 50 converts the input analog signal into a digital signal, and converts the analog signal input from the outside into a digital signal that can be recognized by the CPU 48.

The high speed relay 52 functions to switch a signal applied using a semiconductor element at a high speed, and includes a plurality of high speed switches 53 to 55.

The AC / RMS converter 56-58 converts the input AC power (R phase, S phase, T phase) into the square root of the root mean square value (RMS; effective value, 0.707).

The reverse phase / phase detection waveform shaping unit 60 detects the reverse phase and the open phase of the motor and shapes the detected waveform.

The relay unit 61-65 includes a plurality of relays, and the relay includes an M relay 61, a Y relay 62, a D relay 63, an auto selection signal relay 64, and an over relay 65. It is.

The external automatic contact parallel processing unit 66 is a component that processes one external automatic contact in parallel to a plurality of controllers. The controller power supply 67 is for supplying driving power to the controller. The terminal block 68 is a part connected to drive the motor, the control panel 10 is to control the controller or display the operating state, the fuse 26 is to block the inrush current due to the overvoltage of the applied power. It is a safety device.

In addition, the control panel 10 includes a remote control setting display lamp 11 for notifying the controller of address setting for remote control, a set button 12 for setting the operation of the controller, and operation and setting of the controller. The display unit 14 for visually displaying in relation to the display, the increase / decrease button unit 16 including a plurality of increase / decrease buttons 17-20 for adjusting a set value, and a Y-Δ connection for displaying Y-Δ switching of the motor. Status display lamps 22 and 23, time setting status display lamps 24 and 25 indicating that the operating time of the motor has been set to a predetermined time, and for setting the operation of the motor manually or automatically. The manual / automatic mode setting switch 27, the manual / automatic mode display lamps 28 and 29 for indicating the manual or automatic mode of the motor, the on button 32 for inputting the magnetic switch, and the magnetic switch The off button 30 for blocking and an on or off state are shown On / off state display lamps 31 and 33 for displaying the fault, a plurality of fault state display lamps 34-37 for displaying when the motor is open, reversed, overcurrent or ground current are applied, and the normal state before operation And a test button 39 for turning on the reset state display lamps 34-37 and for shutting off the magnetic switch.

Referring to the operation of the multi-function motor controller of the present invention configured as described above, a unit for driving a large-capacity motor of 50 hp or more and 250 hp or less, without installing a separate current transformer in the unit for driving a motor of 50 hp or less By unifying and standardizing one current transformer, the hassle of selecting the current transformer according to the increase or decrease of the motor capacity is solved.

The controller of the present invention maintains the motor in the operating state even during a momentary power failure for 0.5 seconds while the motor is in operation, and when the power is restored for a power failure of 0.5 seconds or more while driving the motor, the motor is stopped. do. However, when the manual / automatic mode setting switch 27 of the controller is in the automatic position and there is an externally commanded automatic input signal, the controller returns to the operation state at the same time as the recovery.

When the overcurrent or ground current generated in the running motor reaches the overcurrent or ground current value set in the controller, the controller reaches the set value and shuts off the magnetic switch immediately after the cutoff time, and the generated overcurrent or ground current Is displayed on the display unit 14, and corresponding fault status display lamps 34-37 are lit.

When the magnetic switch is cut off due to the overcurrent or ground fault current of the motor in operation, the reset button 38 of the controller can be operated to maintain the normal state before operation, and other than that before the reset button 38 is pressed. Buttons etc. cannot be used.

When the motor in operation is missing or reversed, the magnetic switch is shut off at the same time as the phase or reverse phase is generated.When the motor is phased off, 110, 101, 011 when the phase is lost, and 001, 010 and 100 are reversed. A number is displayed and the corresponding fault status indicator lamps 34-37 light up. At this time, the numbers appearing in phase loss and reverse phase refer to R, S, T phases which are power supply lines, and in case of phase loss, phases corresponding to zero digits are missing, and in reverse phases, digits are indicated. The corresponding phases are considered to be interchanged. However, single-phase motors are not applicable.

If there is a general motor and a spare motor, one automatic input signal commanded from the outside is connected in parallel to the automatic input contact of the controller of the general motor and the spare motor, and it is used. The controller receives one automatic input signal at the same time and operates only one motor mutually. In order to prevent only one of the two motors from operating for a long time, it is normal to use the automatic input signal once. The motor and the spare motor are operated alternately. At this time, if one motor breaks down or breaks down, stop the breakdown motor, display the breakdown signal to the breakdown motor controller, and automatically start and run the other motor that can operate normally. Whenever the automatic input signal commanded from the motor is operated, the motor which can be operated normally continues.

In addition, when the medium-large motor is started in the Y-connected state and operated in the Δ connection, the Y-connection start time can be delayed by the set button 12 added to the front of the controller. Here, in order to adjust the Y-connection start delay time, first, when the set button 12 on the left side of the controller display unit 14 is pressed for at least 1 second, the display unit 14 blinks (flashes), and the set button 12 is pressed. Press repeatedly until the Y-Δ time setting display is displayed. At this time, among the increase / decrease buttons 16 formed on the right side of the display unit 14, the left increase / decrease buttons 17 and 19 are increased by 10 seconds and the right increase / decrease buttons 18 and 20 are adjusted by 1 second to set an appropriate time. After pressing the set button 12 again until the end of the set, the Y-connection start delay time is set, and the Y-Δ connection state display lamps 22 and 23 indicating that the Y-Δ start delay time is set are Lights up.

Here, if you press the On (operation) button 32 of the controller after setting the Y-Δ motor start time, only the Y-connection status display lamp 22 indicating the Y-connection status when the motor is started is turned on. When the start of the state is completed and switching to the? Connection, only the? Connection status display lamp 23 is lit.

When operating a small capacity motor that does not require Y-Δ start, the magnetic trip characteristic curve varies according to the Y-Δ start time setting. Therefore, the Y-Δ start time of the controller should be set to zero.

In addition, when there is no automatic signal input from the outside or when the motor control unit itself needs to operate automatically, the set button 12 added to the front of the controller can set the operation and stop time of the motor. At this time, in order to set the operation time and the stop time of the motor, first, when the set button 12 on the left of the display unit 14 of the controller is pressed for at least 1 second, the display unit 14 of the controller flashes, and the set button 12 Press until the repeat time setting display is displayed. At this time, it is possible to set the time to be operated, and press the set button 12 again to set the time to be stopped. Here, the time setting method of the right increase and decrease button portion 16 of the display unit 14, the left increase and decrease buttons (17, 19) by 10 minutes unit, the right increase and decrease buttons (18, 20) by 1 minute increments to adjust the appropriate time After the set button 12 is pressed again, the set button 12 is repeatedly pressed until the end of the set, and the operation and stop time of the motor is set, and the time setting display lamps 24 and 25 that set the 24 hour operation and stop repetition time light do.

Immediately after setting the 24-hour operation and stop time, the operation time is first performed, and when the set operation time is completed, the operation time is repeatedly performed by repeating the stop time, and the 24-hour timer switches the manual / auto mode setting switch 27 of the controller. Even when positioned manually, it is maintained continuously without any change in time.

In this case, when 24 hours of operation and stop time are set, when the manual / auto mode setting switch 27 of the controller is automatically selected, the operation and stop are repeated by the automatic signal commanded from the outside to the automatic input contact provided in the controller. If you want to do other operation or other operation, you have to set 24 hours operation and stop time to 0.

If you want to set the overcurrent trip value to the controller of the motor control unit when you want to operate the motor according to the capacity of the motor, press the set button 12 on the left of the display unit 14 of the controller for 1 second or longer. Flashes and the set button 12 can be set for the overcurrent trip setting in the next step in which the motor horsepower is displayed. At this time, the current value corresponding to 1.6 times the rated current with respect to the horsepower of the motor is shown on the display unit 14, and the increase / decrease button (on the right side of the display unit 14) is required to increase or decrease the overcurrent trip setting according to the characteristics or the purpose of the motor. 17-20) is increased and decreased to set an appropriate overcurrent trip value, and then the set button 12 is pressed again until the end of the set. Then, the overcurrent trip value corresponding to the rating of the motor is set.

When the overcurrent set value is changed while the motor is running.If the overcurrent or ground fault occurs in the motor while the overcurrent setpoint is changed, the overcurrent reaches the current value indicated on the display unit 14 of the controller, and the set operation time elapses immediately. And the respective fault status indicator lamps 34-37 light up.

If overcurrent or ground current reaches 90% of the overcurrent trip value set in the controller when overcurrent or ground current occurs during normal operation of the motor, the corresponding fault status indicator lamps (34-37) will start flashing and then 100% of the set value. The flashing speeds up as it approaches, the magnetic switch is shut off immediately after the set operation time has elapsed, and the corresponding fault status indicator lamps 34-37 light up.

While the motor is in operation, the operating current of the motor is displayed on the display unit 14 of the controller, and the current display is changed with a time delay of 1 second.

Taking into account that the starting current of the motor is more than 6 times the rated current of the motor when the motor is running, pressing the on button 32 of the controller delays the interruption of the magnetic switch with infinite current for 1 second, and overcurrent according to the motor capacity after 1 second. From the 1000% of the trip set point, it descends in a stepped characteristic curve, and after 10 seconds, the overcurrent trip set point is reached and it becomes a stable normal operation state. If the Y-Δ start delay time is set in the controller used for the motor control unit that operates the medium-large motor, press the run button of the controller to start the Y-connected state and at the same time turn the magnetic switch to infinite current for 1 second. After 1 sec of delay, the overcurrent trip setting value is decreased from 1000% of the overcurrent trip setting value according to the motor capacity, and descends in a stepped characteristic curve to 200% of the overcurrent trip setting value until it changes to Δ connection. The magnetic switch is delayed with infinite current for a second, and after 1 second, the characteristic curve is lowered from 1000% of the overcurrent trip set value according to the motor capacity, and after 10 seconds, the overcurrent trip set value is reached and it becomes a stable normal operation state.

When the test button of the controller is pressed for 1 second, the fault status display lamps 34-37 which display phase loss, reverse phase, overcurrent, and ground current are turned on, and the magnetic switch is shut off.

The controller circuit protection fuse 26 on the front of the controller is protected even when an abnormality occurs in the circuit of the device installed in the motor control unit. The set values of the controller are not cleared even in the event of a power failure.

In the case of operating a motor control center for controlling a plurality of motors, in the case of a central monitoring facility where remote control or monitoring is required, an RS-485 transmission system is added to the communication protocol connection unit 44 as an option. The concentrator receives from the controller of each unit and installs in the main power supply unit.

In addition, when the set button 12 on the left of the display unit 14 of the unit controller is pressed for 1 second to designate a unique number of each unit controller to remotely control or detect the motor control center, the display unit 14 blinks. At this time, the set button 12 is repeatedly pressed until the code designation display is made. At this time, among the right increase / decrease button portions of the display portion 14, the left increase / decrease buttons 17 and 19 are increased by 10 units, and the right increase / decrease button is increased by 1 unit, and the number is set equal to the unit number of the motor controller center. Press again to repeat the set and set the number for the remote control.

Here, when used for a motor for water supply and drainage, it can be installed to operate the motor required for the water level by installing a water level meter without installing a separate level meter.

In the above, the present invention is not limited to the above, but may be sufficiently modified.

As described above, the multi-function motor controller of the present invention includes various functions such as displaying an abnormal state, a setting state and an operating state and a control state of the motor, or setting an input condition, and the like. It is possible to control, and it is possible to control the motor more easily and safely without selecting the current transformer according to the capacity of various motors with one current transformer, thereby providing convenience to the operation of the motor.

Claims (2)

A display unit 14 for displaying a setting or an operating state relating to the control of the motor, A switch input unit 40 including a plurality of input buttons, Communication protocol connection unit 42 for transmitting and receiving data with the outside, A memory unit 46 in which various kinds of data are stored; A CPU 48 for calculating and determining an input signal and outputting a control signal for controlling the motor; A timer 49 for counting a predetermined time set; An A / D converter 50 for converting an analog signal into a digital signal, A high speed relay 52 for switching the applied signal at a high speed; An AC / RMS converter (56-58) for converting an AC power supply into a square root of the root mean square value (RMS); A waveform shaping unit (60) for detecting a reverse phase / phase image for detecting a reverse phase or an open phase of the motor, A relay unit 61-65 for driving a motor, An external automatic contact parallel processing unit 66 for processing external automatic contacts in parallel, A controller power supply 67 for supplying driving power to the controller; A terminal block 68 connected to drive the motor, A control panel 10 for controlling the controller or displaying an operating state; Multifunction motor controller, characterized in that the fuse 26 is made to block the inrush current due to the applied overvoltage. The method of claim 1, wherein the control panel 10 A display lamp 11 indicating that a designated number necessary for remote control or monitoring is input to the controller's monitor; Multi-function set button 12 for setting relating to the operation of the controller, A display unit 14 for visually displaying the operation and setting of the controller, An increase / decrease button portion 16 including a plurality of increase / decrease buttons 17-20 for adjusting a set value, Y-Δ connection status display lamps 22 (23) for indicating the Y-Δ switching of the motor, Time setting display lamps 24 and 25 for indicating that the operation time of the motor is set to a predetermined time; A manual / automatic mode setting switch 27 for manually or automatically setting the operation of the motor, Manual / auto mode display lamps 28 and 29 for indicating the manual or automatic mode of the motor, An on button 32 for supplying power applied to the controller, An off button 30 for shutting off the applied power of the controller, On / off state display lamps 31 and 33 for indicating an on or off state, A plurality of fault status display lamps 34-37 which indicate when a motor is missing phase, reverse phase, overcurrent or ground current; A reset button 38 for maintaining a normal state before operation or displaying a setting state; And a test button (39) for turning on the fault status indicator lamp (34-37), blocking the magnetic switch, and additional equipment for automatically operating a water supply or drainage pump motor.