KR102651695B1 - Rotational speed control system using clutch and pole changing motor(Dahlander motor) - Google Patents

Abstract

The present invention relates to a rotational speed control system using a clutch and a pole number conversion electric motor, and includes a valve for controlling the clutch operation pressure, a device with a built-in clutch and gears for controlling the driven body in the same and opposite rotation direction as the driving body, and the number of poles. Conversion device, a pole number conversion propulsion motor capable of changing the rotational speed of the motor;
It is characterized in that it includes a control unit that controls clutch opening and connection timing before and after changing the number of poles so as to minimize the occurrence of mechanical stress due to a sudden change in rotation speed of the pole number change propulsion motor.
The rotational speed control system using a clutch and a pole conversion electric motor according to the present invention is related to all equipment that requires rotational speed control.

Description

Rotational speed control system using clutch and pole changing motor(Dahlander motor)}

The present invention relates to a rotation speed control system using a clutch and a pole number conversion electric motor. More specifically, the rotation speed of a propeller, which is a driven object used for propulsion and braking, is controlled by controlling the rotation speed of a propeller using a clutch and a pole number conversion device without a power converter. This relates to a system that enables rotational speed conversion control with a conversion motor.

If the number of magnetic poles is changed by changing the wiring connection of the stator winding, the rotational speed of the motor changes. Such a motor is called a pole number conversion motor.

Pole conversion motors do not use a power conversion device that performs electrical pulse switching, so most of the power is used to drive the motor, so not only do they have less power loss, but they are also much simpler and easier to use than other speed control methods. easy. However, pole conversion motors have the disadvantage of rapid mechanical wear because their speed changes at a rapid rate.

The rapid change in speed of a pole number conversion motor can cause stress not only in the motor but also in the driven body, which can cause fatigue failure, so it must be manufactured to withstand rapid speed change. Pole-number conversion motors are widely used in low-capacity devices that require changes in rotation speed.

As such, conventional pole conversion electric motors have various problems and limitations in operation, and there is a need to develop a system that can improve the reliability of equipment, increase stability, and reduce investment and operating costs by improving the operating system.

Korean Patent No. 10-1751063 (2017.06.20)

The present invention was created to solve the above-described conventional problems. The purpose of the present invention is to control the rotational speed of the propeller, which is a driven object used for propulsion and braking, by using a clutch and a pole number conversion electric motor without a power conversion device. The goal is to provide a system that makes this possible.

In order to achieve the above object, the present invention provides a valve for controlling clutch operation pressure, a device with a built-in clutch and gear for controlling the driven body in the same and opposite rotation direction as the driving body, a pole number conversion device, and a rotation speed of an electric motor. A propulsion motor that can change the number of poles;

A rotation speed control system using a clutch and a pole number change motor, comprising: a control unit that controls the opening and connection timing of the clutch before and after the pole number change so as to minimize mechanical stress caused by sudden changes in the rotation speed of the pole number change propulsion motor. provides.

In addition, the present invention to achieve the above object is a device with a built-in clutch and gear for controlling the valve for controlling the clutch operation pressure and the driven body in the same or opposite rotation direction as the driving body, a pole number conversion device, and an electric motor. A pole-changing propulsion motor whose rotational speed can be changed;

A rotation speed control system using a clutch and a pole number change motor, comprising: a control unit that controls the opening and connection timing of the clutch before and after the pole number change so as to minimize mechanical stress caused by sudden changes in the rotation speed of the pole number change propulsion motor. provides.

In addition, the control unit is characterized by a function of adjusting the time required to change the rotational speed of the driven body by reflecting the change slope of the lubricant temperature of the device in the operation time of the valve.

In addition, when the lubricant temperature of the device rises above the allowable level while the clutch of the device is not engaged and the override control function is activated, the control unit switches from rotational speed control to constant lubricant temperature control and alerts the lubricant temperature. It is characterized by a function to return to rotation speed control when the value decreases within the hysteresis.

In addition, the control unit is characterized by a function of adjusting the time required to change the rotation speed of the pole number conversion propulsion motor by reflecting the change slope of the stator winding temperature of the pole number conversion propulsion motor in the operation time of the valve.

In addition, the control unit is characterized by a function of determining the amount of change in load on the driven body based on the difference between the driving torque transmitted for each clutch operating pressure and the rotational speed of the driven body when the clutch of the device is not connected.

In addition, when the clutch of the device is not connected and there is a difference between the slope of the driving torque transmitted for each clutch operating pressure and the slope of the rotational speed of the driven body, the control unit determines the size of this difference according to the lubricant temperature of the device. It is characterized by a function of determining the amount of torque transmission variation.

In addition, the control unit detects that a sudden increase in the transient load of the driven body occurs when the clutch of the device is not engaged, and the sudden increase in the excessive load occurs within the performance class operating limit value for the power supply transient characteristics of the power generation devices. It is characterized by a function of adjusting the setting value of the valve so that the load can be increased within the range.

In addition, when the control unit controls the rotation speed of the driven body after completing the pole number conversion according to the rotation speed change, the speed control is set based on the rotation speed of the driven body after the pole number conversion is completed, not the rotation speed of the driven body when the clutch is opened. It is characterized by having a function to set a value.

In addition, the control unit is characterized in that it has a function of interlocking control of the operation of the clutch and brake of the device when the rotation speed is changed in the opposite rotation direction.

In addition, when the clutch of the device is connected and the rotational speed of the driven body increases due to an increase in the rotational speed of the pole number conversion propulsion motor, the load on the driven body increases. It is characterized by a function that compares the overload operation range of the fuselage with the current output amount and provides an alarm if it exceeds this range.

In addition, with the clutch of the device connected, the control unit compares the output amount at each rotation speed of the pole conversion propulsion motor and the load amount at each rotation speed of the driven body, and compares the load amount at each rotation speed of the driven body with the rotation speed of the pole conversion propulsion motor. If the output amount increases, an alarm is issued that the load amount for each rotation speed of the driven object has increased,

When the output amount by rotational speed of the pole number conversion propulsion motor decreases compared to the load by rotational speed of the driven body, it is characterized by a function to warn that the load by rotational speed of the driven body has decreased.

In addition, the lubricating oil pressure of the device decreases as the lubricating oil temperature increases, and the control unit learns the amount of change in lubricating oil pressure according to the lubricating oil temperature and has a function to check the stability of the lubricating oil viscosity.

In addition, when the clutch of the device is connected and there is a difference between the rotation speed of the input shaft of the device and the rotation speed of the output shaft of the device, the control unit determines the degree of clutch wear based on the size of this difference,

In a state where the clutch of the device is not connected, if the amount of change in the set value transmitted to the valve to keep the rotational speed of the driven body constant exceeds the change value due to the change in lubricant temperature, the size of this difference is also It is characterized by having a function to determine the degree of wear.

In addition, the control unit is characterized by a function of controlling the operating pressure of the clutch by detecting a stick-slip phenomenon that occurs in the torque transmission process between the pole number conversion propulsion motor and the driven body when the clutch of the device is not connected. .

In addition, the control unit is characterized by a function of gradually stopping the driven body by adjusting the setting value of the valve to prevent phenomena such as water hammer action from occurring.

In addition, the control unit is characterized by a function of adjusting the time required to change the rotation speed by adjusting the operating time of the valve based on the change slope of the input rotation speed setting value.

In addition, the control unit is characterized in that it has a function of controlling the generation of regenerative power from the pole number conversion propulsion motor when controlling the rotation speed of the number conversion propulsion motor.

In addition, the control unit is characterized in that it has a function of controlling the braking time of the pole number conversion propulsion motor that was in coasting operation by adjusting the clutch operation pressure of the device with the valve.

In addition, the control unit is characterized in that it has a function of controlling the braking time of the driven body that was driving by coasting by adjusting the clutch operation pressure of the device with the valve.

According to the rotational speed control system using a clutch and a poles conversion electric motor according to the present invention, the rotational speed of the propeller, which is a driven object used for propulsion and braking, can be controlled by a clutch and a poles conversion motor without a power conversion device. It has the effect of reducing investment costs and reducing maintenance costs.

Figure 1 shows a rotation speed control system consisting of a conventional pole number conversion device, a pole number conversion propulsion motor, and a driven body.
Figure 2 shows an example of driving a driven body with a clutch operation pressure control valve, a device with a clutch and gear capable of adjusting the rotation direction of the output side, a pole number conversion device, and a pole number conversion propulsion motor according to the present invention.
Figure 3 shows an example of driving a driven body with a clutch operation pressure control valve, a clutch whose output side rotation direction cannot be adjusted, a device with built-in gears, a pole number conversion device, and a pole number conversion propulsion motor according to the present invention.
Figure 4 shows a representative stator winding wiring diagram of a pole number conversion electric motor.
Figure 5 shows the transmission torque for representative operating pressures of the clutch.
Figure 6 shows energy loss due to slipping of wet clutches, transmission torque, and output rotation speed according to the input shaft rotation speed of the device with a built-in clutch and gear according to the present invention.
Figure 7 shows the rotation speed of the pole number conversion propulsion motor and the rotation speed of the driven body according to the present invention, the range of ^1st stage rotation speed control using a clutch and the 2nd stage rotation speed using a clutch. The control ( ^2nd stage rotation speed control) range is expressed separately.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. First, when adding reference signs to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, if it is judged that it may obscure the gist of the present invention, the detailed description will be omitted. In addition, embodiments of the present invention will be described below, but of course, the technical idea of the present invention is not limited or limited thereto and can be practiced by those skilled in the art.

Figure 1 shows a rotation speed control system consisting of a conventional pole number conversion device 10, a pole number conversion propulsion motor 20, and a driven body 40. Due to a rapid change in speed of the pole number conversion propulsion motor 20, the motor In addition, stress also occurs in the driven body 40, which may cause fatigue failure, so it must be manufactured to withstand rapid changes in speed.

2 and 3 show a device 200 with a clutch operation pressure control valve and a built-in clutch and gear capable of adjusting the rotation direction of the output side, or a device 200 with a built-in clutch and gear that cannot adjust the rotation direction of the output side, and a pole number conversion device. (10) shows an example of driving the driven body 40 with the pole number conversion propulsion motor 20.

Figure 4 shows a representative stator winding wiring diagram of a pole number conversion motor, and herein, the explanation is based on the variable torque type (fan torque).

Figure 5 shows the transmission torque for a representative operating pressure of the clutch. It can be seen that as the clutch operating pressure increases, the transmission torque of the clutch increases proportionally.

Figure 6 shows the energy loss, transmission torque, and output rotation speed due to slipping of the wet clutch according to the input shaft rotation speed of the device with a built-in clutch and gear according to the present invention, and the low rated input shaft rotation speed is due to slipping. It can be seen that energy loss is small.

Figure 7 shows the rotation speed of the pole number conversion propulsion motor and the rotation speed of the driven body according to the present invention, and the first-stage rotation speed control range using the clutch and the second-stage rotation speed control range using the clutch are expressed separately, In the first stage rotation speed control using a clutch, the rotation speed of the driven body 40 is controlled using the slip of the clutch at the first stage rated rotation speed (S1m) of the propulsion motor during rotation speed control using the clutch, and the clutch is In the second-stage rotation speed control stage, the rotation speed of the driven body 40 is controlled using the slip of the clutch at the second-stage rated rotation speed (S2m) of the propulsion motor during rotation speed control using the clutch.

Although not shown in detail, referring to FIGS. 2 and 3, the control unit 300 includes a wireless communication antenna 301, a rotation speed setting signal, an override signal, and an input shaft rotation speed sensor ( 110), output shaft rotation speed detection sensor 111 of a device with a built-in clutch and gears, a lubricant temperature detection sensor 220 of a device with a built-in clutch and gears, a lubricant pressure detection sensor 221 of a device with a built-in clutch and gears ) can be connected.

Before explaining in detail the operation and operation method of the rotation speed control system using a clutch and a pole conversion motor according to the present invention with reference to the attached drawings, the characteristics of the control unit 300 will first be described.

The control unit 300 reflects the gradient of change in lubricant temperature measured by the lubricant temperature detection sensor 220 of the device 200 with a built-in clutch and gear in the operation time of the clutch operation pressure control valve, There is a function that allows you to adjust the time it takes to change rotation speed. When the lubricant temperature of the device 200 with a built-in clutch and gear increases above the normal range, the control unit 300 reflects the slope of the change in lubricant temperature and reduces the time required to change the rotation speed.

In addition, the control unit 300 detects a malfunction of the lubricating oil cooling device of the device 200 with a built-in clutch and gear when the clutch of the device 200 with a built-in clutch and gear is not connected and the override control function is activated. If the lubricant temperature of the device 200 with a built-in clutch and gear measured by the lubricant temperature detection sensor 220 rises above the allowable value, the rotation speed control is switched to constant lubricant temperature control, and the lubricant temperature is set to the hysteresis of the alarm value. If it decreases within this range, there is a function to return to rotation speed control.

In addition, the control unit 300 reflects the change slope of the stator winding temperature of the pole number conversion propulsion motor 20 in the operation time of the clutch operation pressure control valve to determine the time required to change the rotation speed of the pole number conversion propulsion motor 20. There is a function that can be adjusted. When the rotation speed of the pole number conversion propulsion motor 20 increases while the stator winding temperature is high, the rotation speed of the cooling fan installed on the motor shaft increases, so there is no problem in cooling the stator winding, but the rotation speed decreases. In this case, since the rotation speed of the cooling fan installed on the motor shaft decreases, the insulation of the stator winding may deteriorate due to insufficient cooling of the stator winding, so the control unit 300 cools while the rotation speed of the pole number conversion propulsion motor 20 decreases. Increase the time required to change the rotation speed so that this can be sufficiently achieved.

In addition, the control unit 300 controls the driving torque corresponding to the clutch operation pressure measured by the lubricant pressure detection sensor 221 and the driven body 40 in a state in which the clutch of the device 200 with a built-in clutch and gear is not connected. There is a function to determine the amount of change in load on the driven body 40 based on the difference in rotation speed.

In addition, the control unit 300 determines the driving torque gradient transmitted for each clutch operation pressure measured by the lubricant pressure detection sensor 221 and the driven body 40 when the clutch of the device 200 with a built-in clutch and gear is not connected. ), there is a function to determine the size of this difference as the amount of torque transmission variation due to the lubricant temperature of the device 200 with a built-in clutch and gear.

In addition, the control unit 300 determines that when the clutch of the device 200 with a built-in clutch and gear is not connected and a sudden increase in the excessive load on the driven body 40 occurs, the rotation speed of the internal combustion engine supplying power decreases. , the frequency supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 is lowered. At this time, the amount of power surge The rotational speed change amount measured through the input shaft rotational speed detection sensor 110 installed on the input shaft 100 of the device with a built-in clutch and gear. Or the frequency change per hour acquired through power metering and monitoring devices (PMD) installed in the pole number conversion device 10. Or the amount of change in active power per hour can be detected. The control unit 300 detects a sudden increase in the transient load of the driven body 40, and the frequency recovery time after load increase allowed by the performance class operating limit value for the frequency transient characteristics of the internal combustion engine supplying power. ), the frequency can be recovered within . The control unit 300 adjusts the setting value of the clutch operation pressure control valve to increase the slip according to the preset load reduction amount of the driven body 40 according to the power sudden increase, thereby lowering the load on the internal combustion engine, thereby rotating the power supply internal combustion engine. There is a function to ensure that the speed recovers quickly and to gradually return the setting value of the clutch operation pressure control valve to the original setting value when recovery of rotational speed is detected.

In addition, when the control unit 300 controls the rotation speed of the driven body 40 after the pole number conversion is completed according to the rotation speed change, the rotation speed of the driven body 40 is not the rotation speed of the driven body 40 when the clutch is opened, but rather the rotation speed of the driven body 40 after the pole number conversion is completed. There is a function to set the speed control setting value based on the rotation speed of (40). If controlled in this way, sudden speed fluctuations do not occur in the driven body 40, so the occurrence of stress can be minimized.

In addition, the control unit 300 can control the operation of the clutch and brake 112 of the device 200 with a built-in clutch and gear when the rotation speed is changed in the opposite rotation direction. When the speed setting is changed in the opposite rotation direction and the clutch of the device 200 with a built-in clutch and gear is opened, the control unit 300 operates the brake 112 and adjusts the clutch operating pressure of the device 200 with a built-in clutch and gear. When the adjustment progresses, there is a function to release the operation of the brake 112.

In addition, the control unit 300 operates in a state in which the clutch of the device 200 with a built-in clutch and gear is connected, and the rotation speed of the driven body 40 increases due to an increase in the rotation speed of the pole number conversion propulsion motor 20, thereby increasing the rotation speed of the driven body 40. When the load of (40) increases, the device (200) with a built-in clutch and gear, the pole number conversion propulsion motor (20), and There is a function to compare the overload operation range of the driven body 40 with the current output amount and provide an alarm if it exceeds this range.

In addition, the control unit 300 operates the pole number conversion propulsion motor based on information acquired through the power measurement and monitoring device installed in the pole number conversion device 10 while the clutch of the device 200 with a built-in clutch and gear is connected. By comparing the output amount by rotational speed of the driven body (20) and the load by rotational speed of the driven body (40), when the output amount by rotational speed of the pole number conversion propulsion motor (20) increases compared to the load by rotational speed of the driven body (40), the driven body (40) Alerts that the load at each rotation speed of the fuselage 40 has increased,

When the output amount at each rotation speed of the pole conversion propulsion motor 20 decreases compared to the load at each rotation speed of the driven body 40, there is a function to warn that the load at each rotation speed of the driven body 40 has decreased. If foreign matter attaches to the driven body 40 and the resistance increases, the load increases. If wear occurs in the driven body 40 and the resistance decreases, the load decreases.

In addition, the lubricant pressure measured by the lubricant pressure detection sensor 221 of the device 200 with a built-in clutch and gear decreases as the lubricant temperature measured by the lubricant temperature detection sensor 220 increases. The lubricant pressure depends on the lubricant temperature. There is a function to check the stability of the lubricant viscosity by learning the amount of change in the control unit 300.

In addition, the control unit 300 measures the rotation speed of the input shaft 110 installed on the input shaft 100 of the device 200 with a built-in clutch and gear while the clutch is connected. If there is a difference between the rotational speed and the rotational speed measured through the output shaft rotational speed detection sensor 111 installed on the output shaft 101 of the device with a built-in clutch and gear, the degree of clutch wear is determined based on the size of this difference,

In a state where the clutch of the device 200 with a built-in clutch and gear is not connected, the set value transmitted to the clutch operation pressure control valve to maintain the rotational speed of the driven body 40 constant changes when the lubricant pressure changes, If the change in this set value exceeds the change in lubricant temperature, there is a function to determine the degree of clutch wear based on the size of this difference.

In addition, the control unit 300 detects that a stick-slip phenomenon occurs when the clutch of the device 200 with a built-in clutch and gear is not connected, by determining the rotation speed of the input shaft installed on the input shaft 100 of the device with a built-in clutch and gear. Detects the change in rotational speed measured through the detection sensor 110 and the output shaft rotational speed detection sensor 111 installed on the output shaft 101 of a device with a built-in clutch and gear, and corrects the hydraulic adjustment required for the operation of the clutch. It is used as a correction factor and reflected in the clutch operation hydraulic pressure determination circuit or rotation speed determination circuit, and has the function of avoiding stick slip by increasing or decreasing the setting value of the clutch operation pressure control valve.

In addition, the control unit 300 has a function of gradually stopping the driven body 40 by adjusting the setting value of the clutch operation pressure control valve to prevent phenomena such as water hammer action from occurring.

In addition, the control unit 300 has a function of adjusting the time required to change the rotation speed by adjusting the operation time of the clutch operation pressure control valve based on the change slope of the input rotation speed setting value.

In addition, the control unit 300 has a function of controlling the rotational speed of the pole conversion propulsion motor 20 so that regenerative power is not generated from the pole conversion propulsion motor 20.

In addition, the control unit 300 is a clutch operation pressure control valve and has a function of controlling the braking time of the pole number conversion propulsion motor 20 that was operating by coasting by adjusting the clutch operation pressure of the device 200 with a built-in clutch and gear. .

In addition, the control unit 300 is a clutch operation pressure control valve and has a function of controlling the braking time of the driven body 40 in coasting operation by adjusting the clutch operation pressure of the device 200 with a built-in clutch and gear.

Hereinafter, the operation and operation method of the rotation speed control system using a clutch and a pole number conversion electric motor according to the present invention will be described in detail with reference to the attached drawings.

In the device 200 with a built-in clutch and gear shown in FIGS. 2 and 3, when the rotation direction of the driven body 40 is driven in the same rotation direction as the input shaft, the clutch 210 for controlling the same rotation direction of the input shaft and output shaft operates. , When driving in the opposite rotation direction, the clutch 211 for controlling the opposite rotation direction of the input shaft/output shaft operates. Rotation speed can be set in various stages depending on the wiring connection of the stator winding, but here, the pole number conversion propulsion motor (20) and the pole number conversion pony motor (22), which can set the rotation speed in two stages (stage 1 and stage 2), are used. On the premise that the rotation speed adjustment of the driven body 40 is explained as a first-stage rotation speed control using a clutch, a second-stage rotation speed control using a clutch, and then adjustment is made in the opposite rotation direction. As a method to limit the starting current generated when the pole number conversion propulsion motor (20) is started, a pole number conversion small induction motor is used as the pony motor (22). The rotational speed (S1ce) of the driven body at which the clutch must engage during first-stage rotational speed control and the rotational speed (S2ce) of the driven body at which the clutch must engage during second-stage rotational speed control are adjusted according to the judgment of the control unit 300. . The control unit 300 determines the rotational speed of the pole number conversion propulsion motor 20 using the input shaft rotational speed detection sensor 110 installed on the input shaft 100 of the device with a built-in clutch and gear, and determines the rotational speed of the driven body 40. It is determined by the output shaft rotation speed sensor 111 installed on the output shaft 101 of the device with a built-in clutch and gear.

Figure 2 shows an example of driving a device 200 with a built-in clutch and gear capable of adjusting the rotation direction of the driven body 40 according to the present invention with a pole number conversion propulsion motor 20. To start (20), the control unit 300 transmits a power supply signal to the pony motor starter 24 whose wiring connection of the stator winding is adjusted to the first rotation speed. When full voltage is applied from the pony motor starter 24 to the pole number conversion pony motor 22 through the pony motor cable 23, the rotor of the pole number conversion propulsion motor 20 is switched to the pole number conversion pony motor ( It can rotate up to the rated rotation speed of stage 1 of 22). At this time, if it is necessary to limit the starting current of the pole number conversion pony motor 22, a reduced voltage start (Y-△ start, primary resistance start, reactor start, or autotransformer start) is applied to the pony motor starter 24. Equipped with a device for starting or soft starter starting.

When the rotor of the pole conversion propulsion motor 20 reaches the first stage rated rotation speed of the pole conversion pony motor 22, the control unit 300 transmits a power cutoff signal to the pony motor starter 24 and connects the wiring of the stator winding. A power supply signal is transmitted to the pole number conversion device 10 adjusted to the first-stage rated rotation speed (S1m) of the propulsion motor during rotation speed control using this clutch. When power is supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 through the propulsion motor cable 15, the starting of the pole number conversion propulsion motor 20 with the starting current limited is completed. When the start-up of the pole number conversion propulsion motor 20 is completed, the control unit 300 opens the valve of the clutch 210 for controlling the same rotation direction in case of operation in the same rotation direction and adjusts the valve for controlling the clutch operation pressure to control the same rotation direction. Increase the operating pressure of the clutch 210. When the rotational speed of the driven body 40 reaches the rotational speed of the driven body (S1ce) at which the clutch must be engaged during first-stage rotational speed control, the clutch 210 for controlling the same rotation direction is connected.

When the connection of the same rotation direction control clutch 210 is completed in the first stage rotation speed control, the control unit 300 removes the operating pressure of the same rotation direction control clutch 210 and sends a power cutoff signal to the pole number conversion device 10. After transmitting the power supply signal to the pony motor starter 24, the wiring connection of the stator winding is adjusted to a two-stage rotation speed. When full voltage is applied from the pony motor starter (24) to the pole number conversion pony motor (22) through the pony motor cable (23), the rotor of the pole number conversion propulsion motor (20) is switched to 2 of the pole number conversion pony motor (22). It can rotate up to the rated rotation speed. When the rotor of the pole conversion propulsion motor 20 reaches the second stage rated rotation speed of the pole conversion pony motor 22, the control unit 300 transmits a power cutoff signal to the pony motor starter 24 and connects the wiring of the stator winding. A power supply signal is transmitted to the pole number conversion device 10 adjusted to the two-stage rated rotation speed (S2m) of the propulsion motor during rotation speed control using this clutch. When power is supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 through the propulsion motor cable 15, the pole number conversion and starting with the starting current limited of the pole number conversion propulsion motor 20 are completed. When the pole number conversion and starting of the pole number conversion propulsion motor 20 are completed, the control unit 300 opens the valve of the clutch 210 for controlling the same rotation direction and adjusts the valve for controlling the clutch operation pressure to control the clutch 210 for controlling the same rotation direction. Increase the operating pressure. When the rotational speed of the driven body 40 reaches the rotational speed of the driven body (S2ce) at which the clutch must be engaged during two-stage rotational speed control, the clutch 210 for controlling the same rotation direction is connected.

After the connection of the clutch 210 for controlling the same rotation direction in the two-stage rotation speed control is completed and the rotation speed setting signal is input to the control unit 300 as a signal converted to the second stage of the opposite rotation direction, the control unit 300 controls the same rotation direction. After removing the operating pressure of the control clutch 210 and transmitting a power cut-off signal to the pole number conversion device 10, the wiring connection of the stator winding of the pole number conversion device 10 is connected to the 1 of the propulsion motor when controlling the rotation speed using the clutch. Step Switch to the rated rotation speed (S1m) and perform coasting operation of the pole number conversion propulsion motor (20). At this time, if deceleration time adjustment is necessary, the control unit 300 transmits a power cutoff signal to the pole number conversion device 10 and adjusts the clutch operation pressure control valve to increase the rotation speed of the pole number conversion propulsion motor 20 using the clutch. After adjusting the time to reach the first-stage rated rotation speed (S1m) of the propulsion motor during speed control, the operating pressure of the clutch 210 for controlling the same rotation direction is removed.

When the rotation speed of the pole number conversion propulsion motor 20 decreases and reaches the first stage rated rotation speed (S1m) of the propulsion motor during rotation speed control using the clutch, the control unit 300 supplies power to the pole number conversion device 10. transmit signals. When power is supplied to the pole number conversion propulsion motor 20, the deceleration operation of the pole number conversion propulsion motor 20 is completed. When the deceleration operation of the pole number conversion propulsion motor 20 is completed, the control unit 300 opens the valve of the clutch 211 for controlling the opposite rotation direction and adjusts the valve for controlling the clutch operation pressure to operate the clutch 211 for controlling the opposite rotation direction. Increase pressure. When controlled in this way, the rotation speed of the driven body 40, which was operating by coasting, slows down and the rotation direction is changed to the opposite rotation direction. When the rotation speed of the driven body 40 is controlled in the opposite rotation direction in the first stage, the clutch is When the rotational speed (S1ce) of the driven body that must be engaged is reached, the clutch 211 for controlling the opposite rotation direction is connected.

When the opposite rotation direction control clutch 211 is connected in the first stage rotation speed control, the control unit 300 removes the operating pressure of the opposite rotation direction control clutch 211 and supplies power to the pole number conversion device 10. After transmitting the blocking signal, the wiring connection of the stator winding transmits the power supply signal to the pony motor starter 24, which is adjusted to a two-stage rotation speed. When full voltage is applied from the pony motor starter (24) to the pole number conversion pony motor (22) through the pony motor cable (23), the rotor of the pole number conversion propulsion motor (20) is switched to 2 of the pole number conversion pony motor (22). It can rotate up to the rated rotation speed. When the rotor of the pole conversion propulsion motor 20 reaches the second stage rated rotation speed of the pole conversion pony motor 22, the control unit 300 transmits a power cutoff signal to the pony motor starter 24 and connects the wiring of the stator winding. A power supply signal is transmitted to the pole number conversion device 10 adjusted to the two-stage rated rotation speed (S2m) of the propulsion motor during rotation speed control using this clutch. When power is supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 through the propulsion motor cable 15, the pole number conversion and starting with the starting current limited of the pole number conversion propulsion motor 20 are completed. When the pole number conversion and start of the pole number conversion propulsion motor 20 are completed, the control unit 300 opens the valve of the opposite rotation direction control clutch 211 and adjusts the clutch operation pressure control valve to control the opposite rotation direction control clutch 211. Increase the operating pressure. When the rotational speed of the driven body 40 reaches the rotational speed of the driven body (S2ce) at which the clutch must be engaged during second-stage rotational speed control in the opposite rotation direction, the clutch 211 for controlling the opposite rotation direction is connected.

Figure 3 shows an example of driving a device 200 with a built-in clutch and gear that cannot adjust the rotation direction of the driven body 40 according to the present invention with a pole number change propulsion electric motor 20. To start the electric motor 20, the control unit 300 transmits a power supply signal to the pony electric motor starter 24 whose wiring connection of the stator winding is adjusted to a first-stage rotation speed. When full voltage is applied from the pony motor starter (24) to the pole number conversion pony motor (22) through the pony motor cable (23), the rotor of the pole number conversion propulsion motor (20) is switched to 1 of the pole number conversion pony motor (22). It can rotate up to the rated rotation speed. At this time, if it is necessary to limit the starting current of the pole number conversion pony motor 22, the pony motor starter 24 may be subjected to a reduced voltage start (Y-△ start, primary resistance start, reactor start, autotransformer start, or soft starter). Equipped with a device for start-up.

When the rotor of the pole conversion propulsion motor 20 reaches the first stage rated rotation speed of the pole conversion pony motor 22, the control unit 300 transmits a power cutoff signal to the pony motor starter 24 and connects the wiring of the stator winding. A power supply signal is transmitted to the pole number conversion device 10 adjusted to the first-stage rated rotation speed (S1m) of the propulsion motor during rotation speed control using this clutch. When power is supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 through the propulsion motor cable 15, the starting of the pole number conversion propulsion motor 20 with the starting current limited is completed. When the start-up of the pole number conversion propulsion motor 20 is completed, the control unit 300 opens the valve of the clutch 210 for controlling the same rotation direction of the device 200 with a built-in clutch and gear and adjusts the valve for controlling the clutch operation pressure. The operating pressure of the clutch 210 for controlling the same rotation direction is increased. When the rotational speed of the driven body 40 reaches the rotational speed of the driven body (S1ce) at which the clutch must be engaged during first-stage rotational speed control, the clutch 210 for controlling the same rotation direction is connected.

When the connection of the same rotation direction control clutch 210 is completed in the first stage rotation speed control, the control unit 300 removes the operating pressure of the same rotation direction control clutch 210 and sends a power cutoff signal to the pole number conversion device 10. After transmitting the power supply signal to the pony motor starter 24, the wiring connection of the stator winding is adjusted to a two-stage rotation speed. When full voltage is applied from the pony motor starter (24) to the pole number conversion pony motor (22) through the pony motor cable (23), the rotor of the pole number conversion propulsion motor (20) is switched to 2 of the pole number conversion pony motor (22). It can rotate up to the rated rotation speed. When the rotor of the pole conversion propulsion motor 20 reaches the second stage rated rotation speed of the pole conversion pony motor 22, the control unit 300 transmits a power cutoff signal to the pony motor starter 24 and connects the wiring of the stator winding. A power supply signal is transmitted to the pole number conversion device 10 adjusted to the two-stage rated rotation speed (S2m) of the propulsion motor during rotation speed control using this clutch. When power is supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 through the propulsion motor cable 15, the pole number conversion and starting with the starting current limited of the pole number conversion propulsion motor 20 are completed. When pole number conversion and starting of the pole number conversion propulsion motor 20 are completed, the control unit 300 opens the valve of the clutch 210 for controlling the same rotation direction of the device 200 with a built-in clutch and gear and opens the valve for controlling the clutch operation pressure. is adjusted to increase the operating pressure of the clutch 210 for controlling the same rotation direction. When the rotational speed of the driven body 40 reaches the rotational speed of the driven body (S2ce) at which the clutch must be engaged during two-stage rotational speed control, the clutch 210 for controlling the same rotation direction is connected.

After the connection of the clutch 210 for controlling the same rotation direction in the two-stage rotation speed control is completed and the rotation speed setting signal is input to the control unit 300 as a signal converted to the second stage of the opposite rotation direction, the control unit 300 controls the same rotation direction. After removing the operating pressure of the control clutch 210 and transmitting a power cut-off signal to the pole number conversion device 10, the wiring connection of the stator winding of the pole number conversion device 10 is connected to the 1 of the propulsion motor when controlling the rotation speed using the clutch. Step Switch to the rated rotation speed (S1m) and perform coasting operation of the pole number conversion propulsion motor (20). At this time, if deceleration time adjustment is necessary, the control unit 300 transmits a power cutoff signal to the pole number conversion device 10 and adjusts the clutch operation pressure control valve to increase the rotation speed of the pole number conversion propulsion motor 20 using the clutch. After adjusting the time to reach the first-stage rated rotation speed (S1m) of the propulsion motor during speed control, the operating pressure of the clutch 210 for controlling the same rotation direction is removed.

When the rotation speed of the pole number conversion propulsion motor 20 decreases and reaches the first stage rated rotation speed (S1m) of the propulsion motor during rotation speed control using the clutch, the control unit 300 supplies power to the pole number conversion device 10. transmit signals. When power is supplied to the pole number conversion propulsion motor 20, the deceleration operation of the pole number conversion propulsion motor 20 is completed. When the deceleration operation of the pole number conversion propulsion motor 20 is completed, the control unit 300 opens the valve of the clutch 210 for controlling the same rotation direction of the device 200 with a built-in clutch and gear and adjusts the valve for controlling the clutch operation pressure. Thus, the operating pressure of the clutch 210 for controlling the same rotation direction is increased. When the rotational speed of the driven body 40 reaches the rotational speed of the driven body (S1ce) at which the clutch must be engaged during first-stage rotational speed control, the clutch 210 for controlling the same rotation direction is connected.

When the connection of the same rotation direction control clutch 210 is completed in the first stage rotation speed control, the control unit 300 removes the operating pressure of the same rotation direction control clutch 210 and sends a power cutoff signal to the pole number conversion device 10. After delivery, the rotational speed is reduced to “0” rpm by coasting the pole number conversion propulsion motor (20). At this time, if deceleration time adjustment is necessary, the control unit 300 transmits a power cutoff signal to the pole number conversion device 10 and adjusts the clutch operation pressure control valve so that the rotation speed of the pole number conversion propulsion motor 20 is “0” rpm. After adjusting the time to reach , the operating pressure of the clutch 210 for controlling the same rotation direction is removed.

When the rotation speed of the pole number conversion propulsion motor 20 decreases and reaches "0" rpm, the control unit 300 sets the wiring connection of the stator winding to the first rotation speed to start the pole number conversion propulsion motor 20 in the opposite rotation direction. A signal is transmitted to change the phase rotation direction of power to the opposite rotation direction and supply it to the pony electric motor starter 24 adjusted to . When full voltage is applied from the pony motor starter (24) to the pole number conversion pony motor (22) through the pony motor cable (23), the rotor of the pole number conversion propulsion motor (20) is rotated in the opposite direction to that of the pole number conversion pony motor (22). It can be rotated up to the rated rotation speed in the first stage of the rotation direction.

When the rotor of the pole number conversion propulsion motor 20 reaches the first stage rated rotation speed in the opposite rotation direction of the pole number conversion pony motor 22, the control unit 300 transmits a power cutoff signal to the pony motor starter 24 and turns the stator winding. The wiring connection transmits a signal to change the phase rotation direction of power to the opposite rotation direction and supply it to the pole number conversion device (10) adjusted to the first-stage rated rotation speed (S1m) of the propulsion motor when controlling rotation speed using a clutch. do. When power is supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 through the propulsion motor cable 15, starting in the opposite rotation direction of the pole number conversion propulsion motor 20 with the starting current limited is completed. When the opposite rotation direction start of the pole number conversion propulsion motor 20 is completed, the control unit 300 opens the valve of the clutch 210 for controlling the same rotation direction of the device 200 with a built-in clutch and gear and opens the valve for controlling the clutch operation pressure. is adjusted to increase the operating pressure of the clutch 210 for controlling the same rotation direction. When the rotational speed of the driven body 40 reaches the rotational speed of the driven body (S1ce) at which the clutch must be engaged when controlling the first-stage rotational speed in the opposite rotation direction, the clutch 210 for controlling the same rotation direction is connected.

When the connection of the same rotation direction control clutch 210 is completed in the first stage rotation speed control in the opposite rotation direction, the control unit 300 removes the operating pressure of the same rotation direction control clutch 210 and supplies power to the pole number conversion device 10. After transmitting the blocking signal, the wiring connection of the stator winding transmits a signal to switch the phase rotation direction of power to the opposite rotation direction and supply it to the pony electric motor starter 24 adjusted to the two-stage rotation speed. When full voltage is applied from the pony motor starter (24) to the pole number conversion pony motor (22) through the pony motor cable (23), the rotor of the pole number conversion propulsion motor (20) is rotated in the opposite direction to that of the pole number conversion pony motor (22). It can be rotated up to the rated rotation speed in level 2 of the rotation direction. When the rotor of the pole number conversion propulsion motor 20 reaches the second stage rated rotation speed in the opposite rotation direction of the pole number conversion pony motor 22, the control unit 300 transmits a power cutoff signal to the pony motor starter 24 and turns the stator winding. The wiring connection transmits a signal to change the phase rotation direction of power to the opposite rotation direction and supply it to the pole number conversion device (10) adjusted to the second-stage rated rotation speed (S2m) of the propulsion motor when controlling rotation speed using a clutch. do. When power is supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 through the propulsion motor cable 15, the pole number conversion and opposite rotation direction start of the pole number conversion propulsion motor 20 are completed. When the pole number conversion and opposite rotation direction start of the pole number conversion propulsion motor 20 are completed, the control unit 300 opens the valve of the clutch 210 for controlling the same rotation direction of the device 200 with a built-in clutch and gear and operates the clutch. The operating pressure of the clutch 210 for controlling the same rotation direction is increased by adjusting the pressure control valve. When the rotational speed of the driven body 40 reaches the rotational speed of the driven body (S2ce) at which the clutch must be engaged when controlling the rotational speed in two stages in the opposite rotation direction, the clutch 210 for controlling the same rotation direction is connected.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications, changes, and substitutions can be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the attached drawings are not intended to limit the technical idea of the present invention, but are for illustrative purposes, and the scope of the technical idea of the present invention is not limited by these embodiments and the attached drawings. The scope of protection of the present invention should be interpreted in accordance with the claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

S1m: The first stage rated rotation speed of the propulsion motor when controlling the rotation speed using a clutch.
S2m: 2nd stage rated rotation speed of the propulsion motor when controlling the rotation speed using a clutch
S1ce: The rotational speed of the driven body at which the clutch must be engaged when controlling the first-stage rotational speed.
S2ce: The rotation speed of the driven body at which the clutch must be engaged when controlling the 2-stage rotation speed.
10: pole switching device
15: Cables for propulsion motor
20: Propulsion motor (pole changing motor)
21: Pony motor output shaft
22: Pony motor (pole changing motor)
23: Cable for pony electric motor
24: Pony electric motor starter
30: Shaft connecting pole number conversion propulsion motor and driven body
40: driven body
100: Input shaft of a device with a built-in clutch and gear
101: Output shaft of device with built-in clutch and gear
110: Input shaft rotation speed detection sensor of a device with a built-in clutch and gear
111: Output shaft rotation speed detection sensor of a device with a built-in clutch and gear
112: brake
200: Device with built-in clutch and gear
210: Clutch for controlling the same rotation direction of the input shaft/output shaft
211: Clutch for controlling the opposite rotation direction of the input shaft/output shaft
220: Lubricating oil temperature detection sensor of a device with a built-in clutch and gear
221: Lubricating oil pressure detection sensor of a device with a built-in clutch and gear
300: Control unit
301: Antenna for wireless communication
400: wireless terminal

Claims (20)

A device (200) with a built-in clutch and gear for controlling the valve for controlling the clutch operation pressure and the driven body (40) in the same and opposite rotation direction as the driving body, a pole number conversion device (10), and a device for changing the rotational speed of the electric motor. A pole number conversion propulsion motor (20);
A control unit 300 that controls the clutch opening (disengagement) and engagement (engagement) points before and after the pole number change to minimize the occurrence of mechanical stress due to the rapid rotation speed change of the pole number change propulsion motor 20. ,
In a state where the clutch of the device 200 is not connected, the control unit 300 determines the amount of change in load on the driven body 40 based on the difference between the driving torque transmitted for each clutch operation pressure and the rotational speed of the driven body 40. A rotation speed control system using a clutch and a pole number conversion electric motor, which has the function of: A device (200) with a built-in clutch and gear for controlling the valve for controlling the clutch operation pressure and the driven body (40) in the same or opposite rotation direction as the driving body, a pole number conversion device (10), and a device for changing the rotational speed of the electric motor. A pole number conversion propulsion motor (20);
A control unit 300 that controls the clutch opening and connection timing before and after the pole number change so as to minimize mechanical stress caused by a sudden change in rotation speed of the pole number change propulsion motor 20,
In a state where the clutch of the device 200 is not connected, the control unit 300 determines the amount of change in load on the driven body 40 based on the difference between the driving torque transmitted for each clutch operation pressure and the rotational speed of the driven body 40. A rotation speed control system using a clutch and a pole number conversion electric motor, which has the function of: According to claim 1 or 2,
The control unit 300 has a function to adjust the time required to change the rotational speed of the driven body 40 by reflecting the gradient of change in the lubricant temperature of the device 200 in the operation time of the valve. A rotation speed control system using a clutch and a pole conversion electric motor. According to claim 1 or 2,
When the lubricant temperature of the device 200 rises above the allowable value while the clutch of the device 200 is not connected and the override control function is activated, the control unit 300 controls the rotation speed of the lubricant oil. A rotation speed control system using a clutch and a pole number conversion electric motor, characterized by a function of switching to constant temperature control and returning to rotation speed control when the lubricant temperature decreases within the hysteresis of the alarm value. delete delete According to claim 1 or 2,
When the clutch of the device 200 is not connected and there is a difference between the slope of the driving torque transmitted for each clutch operating pressure and the slope of the rotational speed of the driven body 40, the control unit 300 determines the size of this difference. A rotational speed control system using a clutch and a pole number conversion electric motor, characterized in that it has a function of determining the amount of torque transmission variation due to the lubricating oil temperature of the device (200). According to claim 1 or 2,
When the frequency supplied from the pole number conversion device 10 to the pole number conversion propulsion motor 20 is lowered when the clutch of the device 200 is not connected, the control unit 300 generates a transient of the driven body 40. ) Detect when a load surge occurs, and set the valve's set point so that the transient load surge can be increased within the range allowed by the performance class operating limit value for the power supply transient characteristics of the power generation devices. ) A rotation speed control system using a clutch and a pole number conversion electric motor, characterized by a function of adjusting the speed. According to claim 1 or 2,
When the control unit 300 controls the rotation speed of the driven body 40 after the pole number conversion is completed according to the rotation speed change, the rotation speed of the driven body 40 when the clutch is opened is not the rotation speed of the driven body 40 after the pole number conversion is completed. ) A rotation speed control system using a clutch and a pole number conversion electric motor, characterized by a function of setting the speed control setting value based on the rotation speed of ). According to claim 1 or 2,
The control unit 300 has a function of interlocking control of the operation of the clutch and brake 112 of the device 200 when the rotation speed is changed in the opposite rotation direction. Rotation speed control using a clutch and a pole number conversion electric motor. system. According to claim 1 or 2,
In a state where the clutch of the device 200 is connected, the control unit 300 increases the rotational speed of the driven body 40 due to an increase in the rotational speed of the pole conversion propulsion motor 20, so that the load on the driven body 40 increases. When increasing, the overload operation range of the device 200, the pole number conversion propulsion motor 20, and the driven body 40 is compared with the current output amount, and when it exceeds this, the clutch is characterized in that it has an alarm function. Rotation speed control system using a pole number conversion electric motor. According to claim 1 or 2,
In a state where the clutch of the device 200 is connected, the control unit 300 compares the output amount for each rotation speed of the pole conversion propulsion motor 20 and the load amount for each rotation speed of the driven body 40 to drive the driven body 40. When the output amount by rotation speed of the pole number conversion propulsion motor 20 increases compared to the load by rotation speed, an alarm is given that the load by rotation speed of the driven body 40 has increased,
When the output amount by rotation speed of the pole number conversion propulsion motor 20 decreases compared to the load by rotation speed of the driven body 40, it is characterized by an alarm function that the load by rotation speed of the driven body 40 has decreased. Rotational speed control system using a clutch and a pole conversion electric motor. According to claim 1 or 2,
The lubricant pressure of the device 200 decreases as the lubricant temperature increases, and the control unit 300 learns the amount of change in lubricant pressure depending on the lubricant temperature and has a function to check the stability of the lubricant viscosity. A rotation speed control system using a clutch and a pole conversion electric motor. According to claim 1 or 2,
When the clutch of the device 200 is connected and there is a difference between the rotation speed of the input shaft of the device 200 and the rotation speed of the output shaft of the device 200, the control unit 300 controls the clutch by the size of this difference. Determine the degree of wear (clutch wear),
In a state where the clutch of the device 200 is not connected, if the amount of change in the set value transmitted to the valve to keep the rotational speed of the driven body 40 constant exceeds the change value due to the change in lubricant temperature, this A rotational speed control system using a clutch and a pole number conversion electric motor, characterized by a function of determining the degree of clutch wear based on the size of the difference. According to claim 1 or 2,
The control unit 300 detects a stick slip phenomenon that occurs in the torque transmission process between the pole conversion propulsion motor 20 and the driven body 40 when the clutch of the device 200 is not connected. A rotation speed control system using a clutch and a pole number conversion electric motor, characterized by a function of controlling the operating pressure of the clutch. According to claim 1 or 2,
The control unit 300 uses a clutch and a pole number conversion motor, which has a function of gradually stopping the driven body 40 by adjusting the setting value of the valve to prevent phenomena such as water hammering from occurring. Rotational speed control system used. According to claim 1 or 2,
The control unit 300 uses a clutch and a pole number conversion motor, characterized in that it has a function of adjusting the time required to change the rotation speed by adjusting the operating time of the valve based on the change slope of the input rotation speed setting value. Rotational speed control system. According to claim 1 or 2,
The control unit 300 has a clutch and pole number conversion function that prevents regenerative energy from being generated in the pole number change propulsion motor 20 when controlling the rotation speed of the pole number change propulsion motor 20. Rotational speed control system using an electric motor. According to claim 1 or 2,
The control unit 300 is a clutch, characterized in that it has a function of controlling the braking time of the pole number conversion propulsion motor 20 that was coasting by adjusting the clutch operating pressure of the device 200 with the valve. Rotation speed control system using a pole number conversion electric motor. According to claim 1 or 2,
The control unit 300 uses a clutch and a pole number conversion motor, characterized in that it has a function of controlling the braking time of the driven body 40 that was driving by coasting by adjusting the clutch operation pressure of the device 200 with the valve. Rotational speed control system.