CN115395859A - High-reliability full-range electromechanical integrated speed regulating device based on planetary gear transmission - Google Patents

Abstract

The invention relates to the field of high-power speed regulation, in particular to a high-reliability full-range electromechanical integrated speed regulation device based on planetary gear transmission. The speed regulating device can further improve the reliability and has linkage standby capability.

Description

High-reliability full-range mechatronic speed control device based on planetary gear transmission

technical field

The invention relates to the field of high-power speed regulation, specifically a high-reliability full-range mechatronic speed regulation device based on planetary gear transmission, which is suitable for the field of industrial drive speed regulation, such as power station boiler feed water pumps, petrochemical and natural gas industry compressors and other equipment driver etc.

Background technique

The electromechanical integrated planetary speed control device has achieved good operation performance since it was put into operation in some demonstration projects recently. As the most efficient high-power speed control device at present, it has attracted great attention from related industries, and its reliability level can also be recognized by most industries. However, some special applications have higher requirements for reliability, such as a thermal power generation unit without a backup feed water pump, a petrochemical production line with a single compressor, etc. Once an equipment failure occurs, it will Large losses are caused, and the reliability of the electromechanical integrated planetary gear speed control device needs to be further improved. Moreover, the existing electromechanical integrated planetary gear speed control device adopts the same full-capacity frequency conversion method as the motor, and it is difficult to achieve accident linkage backup.

Contents of the invention

The invention provides a high-reliability full-range electromechanical integrated speed regulating device based on planetary gear transmission, which can further improve reliability and has linkage backup capability. The application number is 202110958640.3, and the invention name is an invention patent application for a mechatronic planetary speed regulating device with full range speed regulation. It discloses a mechatronic planetary speed regulating device. and system improvements.

The present invention is realized by adopting the following technical scheme: a high-reliability full-range mechatronic speed regulating device based on planetary gear transmission, including a main drive motor, a main drive end gear, a differential planetary mechanism, an idler gear at a speed regulating end, a speed regulating Speed-end gear, synchronous automatic clutch, clutch output gear, clutch output idler, speed-regulating motor, four-quadrant inverter, main drive motor bypass switch, factory power system, speed-regulating motor switch and main drive motor incoming line The switch, the input shaft of the inner ring gear of the differential planetary mechanism is connected to the main drive end gear, the main drive end gear is connected to the clutch output end gear through the clutch output end idler gear, the clutch output end gear is connected to the output shaft of the synchronous automatic clutch, and the main drive end gear is connected to the clutch output end gear. The motor is connected to the gear at the main driving end, the sun gear of the differential planetary mechanism is connected to the driven equipment, the planet carrier of the differential planetary mechanism is connected to the idler gear at the speed regulating end, the idle gear at the speed regulating end meshes with the speed regulating end gear, and the speed regulating end gear One end is connected to the speed-regulating motor, and the idler gear at the speed-regulating end is connected to the input shaft of the synchronous automatic clutch. It also includes an electromagnetic brake, a phase-shifting transformer, a solid-state soft start device, a phase-shifting transformer incoming switch, and a forward bypass switch for the speed-regulating motor. It is connected to the reverse bypass switch of the speed regulating motor, and the other end of the speed regulating end gear is connected to the electromagnetic brake. The second low-voltage winding of the phase transformer is connected to the speed-regulating motor through the forward bypass switch of the speed-regulating motor and the reverse bypass switch of the speed-regulating motor, and the first low-voltage winding of the phase-shifting transformer is connected to the input end of the four-quadrant frequency converter. The output end of the frequency converter is connected to the speed-regulating motor through the speed-regulating motor switch, the high-voltage winding of the phase-shifting transformer is connected to the utility power system through the phase-shifting transformer inlet switch, and one end of the solid-state soft starter is connected to the utility power system through the main drive motor inlet switch , the other end is connected to the main drive motor, and the two ends of the solid-state soft starter are also connected in parallel with a main drive motor bypass switch.

Working principle: When the electromechanical integrated speed control device starts normally, the four-quadrant frequency converter drives the speed control motor to start with frequency conversion speed control, thereby driving the speed control end gear, the speed control end idler gear and the planet carrier to increase speed, and the speed control end idler The speed of the wheel increases to make the synchronous automatic clutch engage to drive the gear at the output end of the clutch, the idler gear at the output end of the clutch and the gear at the main drive end to increase speed, thereby driving the main drive motor and the inner ring gear to increase speed, so that the sun gear drives the driven equipment to increase speed. When the output of the four-quadrant inverter reaches the highest reverse frequency, the main drive motor reaches the synchronous speed corresponding to the power frequency, and at this time the speed of the driven equipment reaches the upper limit of the speed regulation speed in the low speed range. Then, the main drive motor is started by the solid-state soft-start device in the way of thyristor ramp voltage (soft grid-connected). After reaching the rated voltage, the bypass switch of the main drive motor is closed, the solid-state soft-start device quits operation, and the output of the four-quadrant inverter is gradually reduced. Frequency, as the speed of the speed regulating motor decreases, the synchronous automatic clutch disengages, and the speed of the sun gear increases, driving the driven equipment to continue to increase in speed, entering the high-speed range speed regulation working condition, and then the speed increases with the speed regulating motor commutating to the highest speed, at this time the speed of the driven equipment reaches the upper limit of speed regulation in the high-speed range.

In the high-speed interval speed regulation condition, when the four-quadrant frequency converter of the electromechanical integration speed regulation device trips due to a fault, the treatment method is determined according to the operating speed of the driven equipment before the fault. When the running speed of the driving equipment is relatively high, when the speed-regulating motor runs forward at a relatively high speed, the forward bypass switch of the speed-regulating motor can be interlocked to switch the speed-regulating motor to power frequency operation (forward rotation). When the rotational speed of the speed regulating motor is low or the speed regulating motor fails, the electromagnetic brake can be activated to stop the speed regulating motor; when the operating speed of the driving equipment is relatively low, the speed regulating motor will run in reverse at a higher speed and can be interlocked and closed The reverse bypass switch of the speed-regulating motor cuts the speed-regulating motor into power frequency operation (reverse); When the motor speeds up to the maximum speed, the synchronous automatic clutch will be automatically engaged, and the driven equipment will keep running at a constant speed.

When the driven equipment is linked to standby, the working equipment trips, the standby equipment is interlocked to start, the main drive motor is fully voltage-driven, and the entire electromechanical integrated speed control device is driven to increase speed. At this time, the synchronous automatic clutch is engaged, and the electromechanical integrated speed control device It is equivalent to a gear box with a fixed speed ratio. When the main drive motor is at a constant speed, the speed of the driven equipment reaches the upper limit of the low-speed speed regulation range (the lower limit of the high-speed speed regulation range). During the speed-up process of the main drive motor, the four-quadrant inverter starts synchronously, and the speed-regulating motor boosts the voltage. After the main drive motor reaches a fixed speed, the speed-regulating motor enters the frequency conversion working state, and the driven equipment enters the high-speed interval speed-regulating operation state.

The above-mentioned high-reliability full-range mechatronic speed control device based on planetary gear transmission, the phase-shifting transformer is replaced by a double-winding transformer or a three-winding transformer, the low-voltage winding of the double-winding transformer has a center tap, and the low-voltage winding of the double-winding transformer is connected to four quadrants The input terminal of the frequency converter, the middle tap of the low-voltage winding of the double-winding transformer is connected to the bypass switch of the speed regulating motor, the first low-voltage winding of the three-winding transformer of the three-winding transformer is connected to the input terminal of the four-quadrant frequency converter, and the three-winding transformer of the three-winding transformer The second low voltage winding is connected to the bypass switch of the speed regulating motor.

In the above-mentioned high-reliability full-range mechatronic speed regulating device based on planetary gear transmission, the speed regulating motor is replaced by a servo motor.

In the above-mentioned high-reliability full-range mechatronic speed regulating device based on planetary gear transmission, the idler gear at the output end of the clutch is a two-stage idler gear at the output end of the clutch. Other stages may be used to match the center distance or steering of the gears, and in other Position setting idler.

The above-mentioned high-reliability full-range mechatronic speed regulating device based on planetary gear transmission, the transmission mechanism may include a speed regulating motor, a speed regulating end idler wheel, a speed regulating end gear, a synchronous automatic clutch, a clutch output end gear and a clutch output end The idler gear and the transmission mechanism can also only include the speed-regulating motor, the speed-regulating end idler wheel, and the speed-regulating end gear. On the basis of the original set of traditional mechanisms, another set of transmission mechanisms can be added.

The above-mentioned high-reliability full-range electromechanical integrated speed control device based on planetary gear transmission, the speed control motor is a high-speed motor, and the design frequency is higher than the power frequency (50Hz or 60Hz).

The beneficial effects of the present invention are:

1) The present invention can realize that in the case of a four-quadrant frequency converter tripping due to a fault, the speed-regulating motor can be switched to power frequency operation to maintain constant speed operation of the device.

2) The present invention can electromagnetically brake the speed-regulating motor to maintain constant-speed operation of the device when the four-quadrant frequency converter or the speed-regulating motor trips due to failure.

3) The present invention can realize multiple constant-speed running speeds, and in the case of a four-quadrant frequency converter or a speed-regulating motor tripping due to a fault, it can well match the process flow and improve system reliability.

4) The present invention can realize accident linkage backup of driven equipment.

Description of drawings

Figure 1 is a schematic diagram of the shaft system structure of a high-reliability full-range mechatronic speed regulating device based on planetary gear transmission.

Figure 2 is a schematic diagram of the electrical system of a high-reliability full-range mechatronic speed regulating device based on planetary gear transmission.

Fig. 3 is a schematic diagram of power flow of a high-reliability full-range mechatronic speed regulating device based on planetary gear transmission under low-speed conditions.

Figure 4 is a schematic diagram of the power flow of a high-reliability full-range mechatronic speed control device based on planetary gear transmission under high-speed working conditions (planet carrier reverse).

Figure 5 is a schematic diagram of the power flow of the high-reliability full-range mechatronic speed control device based on planetary gear transmission under high-speed working conditions (planetary carrier forward rotation).

Fig. 6 is a schematic diagram of a three-winding transformer of a high-reliability full-range mechatronic speed regulating device based on planetary gear transmission.

Fig. 7 is a schematic diagram of a double-winding transformer of a high-reliability full-range mechatronic speed regulating device based on planetary gear transmission.

In the figure: 1-main drive motor, 2-main drive end coupling, 3-main drive end gear, 4-internal ring gear, 5-planet carrier, 6-sun gear, 7-output end coupling, 8 - Feed water pump, 9- Idler gear at speed regulating end, 10- Speed regulating end gear, 11- Synchronous automatic clutch, 12- Clutch output end gear, 13- Two-stage idler gear at clutch output end, 14- Speed regulating end coupling , 15-speed regulating motor, 16-four-quadrant inverter, 17-speed regulating motor reverse bypass switch, 18-main drive motor bypass switch, 19-factory power system, 20-speed regulating motor switch, 21- Main drive motor incoming switch, 22-Solid state soft start device, 23-Electromagnetic brake, 24-Electromagnetic brake coupling, 25-Phase-shifting transformer high-voltage winding, 26-Phase-shifting transformer incoming line switch, 27-Phase-shifting transformer No. 1 low-voltage winding, 28-phase-shifting transformer second low-voltage winding, 29-speed motor forward bypass switch, 30-three-winding transformer high-voltage winding, 31-three-winding transformer first low-voltage winding, 32-three-winding transformer second Low-voltage winding, 33-double-winding transformer high-voltage winding, 34-double-winding transformer low-voltage winding.

Detailed ways

Embodiment 1: A high-reliability full-range electromechanical integrated speed control device based on planetary gear transmission, which is applied to a boiler feed water pump in a power station as an example, includes a main drive motor 1, a main drive end coupling 2, and a main drive end gear 3 , inner ring gear 4, planetary carrier 5, sun gear 6, output coupling 7, feed water pump 8, speed regulating end idler 9, speed regulating end gear 10, synchronous automatic clutch 11, clutch output end gear 12, clutch The two-stage idler gear 13 at the output end, the speed-regulating end coupling 14, the speed-regulating motor 15, the electromagnetic brake 23 and the electromagnetic brake coupling 24 are connected as shown in Figure 1, and the speed at the reversing point of the planet carrier is 80.3% Rated speed design, in which the inner ring gear 4, the planetary carrier 5 and the sun gear 6 form a differential planetary mechanism, the idler gear 9 at the speed regulating end, the speed regulating end gear 10 and the planetary carrier 5 constitute the speed regulating mechanism of the differential planetary mechanism, The idle gear 9 at the speed regulating end, the synchronous automatic clutch 11, the gear 12 at the output end of the clutch, the two-stage idler gear 13 at the output end of the clutch, and the gear 3 at the main driving end constitute the speed regulating/constant speed clutch mechanism of the main driving motor, and also include a four-quadrant frequency converter 16. Main drive motor bypass switch 18, plant power system 19, speed regulating motor switch 20, main drive motor incoming switch 21, solid state soft start device 22, phase-shifting transformer high-voltage winding 25, phase-shifting transformer incoming switch 26 , the first low-voltage winding 27 of the phase-shifting transformer (there are multiple first low-voltage windings of the phase-shifting transformer), the second low-voltage winding 28 of the phase-shifting transformer, the forward bypass switch 29 of the speed-regulating motor and the reverse bypass switch 17 of the speed-regulating motor , the connection method is shown in Figure 2.

The device starts from zero and adjusts the speed in the low-speed interval: the electromagnetic brake 23 is in the non-braking state, the main drive motor bypass switch 18 and the main drive motor incoming line switch 21 are in the off state, the solid-state soft start device 22 is not activated, and the phase shift The transformer incoming switch 26 is closed, the phase-shifting transformer is electrified, the four-quadrant inverter 16 is powered on, the speed regulating motor switch 20 is closed, the four-quadrant inverter 16 is started, and the output frequency of the four-quadrant inverter 16 is gradually increased to drive speed regulation The motor 15 speeds up, thereby driving the gear 10 at the speed-regulating end and the idler gear 9 at the speed-regulating end to speed up, and the idler gear 9 at the speed-regulating end speeds up so that the synchronous automatic clutch 11 is engaged to drive the gear 12 at the output end of the clutch and the two-stage idler gear at the output end of the clutch 13 and the gear 3 at the main drive end increase in speed, thereby driving the main drive motor 1 and the inner ring gear 4 to increase in speed, thus driving the planetary carrier 5, the sun gear 6 and the feed water pump 8 to increase in speed, and the planetary carrier 5 is in turn adjusted to the speed The end idler gear 9 transmits power to form a closed mechanical power cycle. At this time, the entire mechatronic speed regulating device forms a whole and becomes a gear box with a constant speed ratio. The speed-regulating motor 15 reaches the maximum reverse speed, at this time, the feedwater pump 8 reaches the upper limit of speed regulation in the low-speed range (53.3% speed, corresponding to the frequency of the four-quadrant inverter 16 is -100Hz), and the speed range of the feedwater pump 8 is 0%. ~53.3%, the power flow is shown in Figure 3, the cut-off point between the high-speed speed regulation range and the low-speed speed regulation range can be optimized according to the working conditions of the driven equipment.

Speed regulation in the low-speed range and high-speed range: When the output of the four-quadrant inverter 16 reaches the highest reverse frequency, the main drive motor 1 reaches the synchronous speed corresponding to the power frequency, and the speed of the feed pump 8 reaches the upper limit of the speed in the low-speed range. Then, the main drive motor incoming line switch 21 is closed, and the main drive motor 1 is started by using the thyristor slope voltage mode through the solid state soft starter 22. After reaching the rated voltage, the main drive motor bypass switch 18 is closed, and the solid state soft starter 22 exits. Running, the device switches from low-speed range speed regulation to high-speed range speed regulation.

Feed water pump working speed range speed regulation (high-speed interval speed regulation): When the device completes the low-speed interval speed regulation to the high-speed interval speed regulation, the device is at the lower limit of the high-speed interval speed regulation speed range (the planet carrier and the inner ring gear rotate in the same direction, according to The principle of planetary differential speed, the inner ring gear rotates at a constant speed. When the rotation of the planetary carrier and the inner ring gear are the same, the speed of the planetary carrier increases, and the speed of the sun gear decreases. the lower limit of the speed range), the speed-regulating motor 15 is at the highest speed of its speed-regulating range, and the synchronous automatic clutch 11 is still engaged. The speed of the input end of the automatic clutch 11 decreases, while the speed of the output end remains unchanged. Therefore, the synchronous automatic clutch 11 is disengaged, and the speed of the feed water pump 8 rises. The speed range of 8 is 53.3% to 80.3%, and the power flow is shown in Figure 4. When the speed-regulating motor 15 is commutated to rotate in the forward direction until the maximum speed of forward rotation (corresponding to the frequency of the four-quadrant inverter 16 is 73.3Hz), the speed range of the feed water pump 8 is 80.3% to 100%, and the power flow is shown in Figure 5 shown.

Speed regulation in high-speed intervals and speed regulation in low-speed intervals: the speed of the speed regulation motor 15 (reverse) reaches the upper limit of the speed regulation range, the synchronous automatic clutch 11 is engaged, the bypass switch 18 of the main drive motor is disconnected, and the main drive motor 1 enters the passive rotation state , and then gradually reduce the output frequency of the four-quadrant frequency converter 16, the rotational speed of the speed regulating motor 15 decreases, and the rotational speed of the feedwater pump 8 also decreases synchronously.

Accident working condition with high unit load: At this time, the speed regulating motor 15 is in the forward rotation state. The relatively weakest link of the high-reliability full-range mechatronic speed regulating device based on planetary gear transmission is the four-quadrant frequency converter 16. When the four-quadrant When the quadrant frequency converter 16 trips due to fault, disconnect the speed-regulating motor switch 20, interlock and close the speed-regulating motor forward bypass switch 29, and cut the speed-regulating motor 15 into power frequency operation (forward rotation), directly by the phase-shifting transformer The second low-voltage winding 28 is connected with [the load of the speed-regulating motor 15 is about 60% at this time, and the power factor of this type of motor does not change much. Therefore, under the same current situation, the voltage of the second low-voltage winding 28 of the phase-shifting transformer is about 60%. Transformer's first low-voltage winding (multiple, connected to four-quadrant frequency converter) is 60% of the capacity of 27, which can reduce the impact when cutting power frequency], at this time, the speed of the feed pump is 93.7% of the rated speed, and the general unit configuration is 2×50% Capacity operating pumps, after one pump is switched to constant speed operation, the feed water flow can be adjusted within a certain range through the other pump, and the unit can still change the load within a certain range.

Moderate load accident working condition of the unit: at this time, the speed-regulating motor 15 is in a low-speed state of forward rotation or reverse rotation. The brake 23 brakes the planet carrier 5. At this time, the speed of the feed water pump is 80.3% of the rated speed. Generally, the unit is equipped with 2×50% capacity running pumps. Adjust the feed water flow within a certain range, and the unit can still change the load within a certain range.

Accident working condition with low load of the unit: At this time, the speed regulating motor 15 is in the state of reverse rotation. When the quadrant frequency converter 16 trips due to fault, disconnect the speed-regulating motor switch 20, interlock and close the speed-regulating motor reverse bypass switch 30, and cut the speed-regulating motor 15 into power-frequency operation (reverse rotation), directly by the phase-shifting transformer The low-voltage winding (connected to the speed-regulating motor) 28 is connected (at this time, the load of the speed-regulating motor 15 is about 30%). At this time, the speed of the feed water pump is 66.8% of the rated speed. Generally, the unit is equipped with 2×50% capacity running pumps, one After the pump is switched to constant speed operation, the feed water flow can be adjusted within a certain range through another pump, and the unit can still change the load within a certain range.

When the load of the unit is extremely low (deep peak regulation state), the speed regulating motor 15 is in a high-speed state of reverse rotation. Will reduce, when the rotating speed is reduced to 53.3% rotating speed, synchronous automatic clutch 11 engages, feed water and turn over to constant speed running state.

According to the above accident conditions, according to the different loads of the unit before the accident, the feed water pump has four speeds of 93.7%, 80.3%, 66.8% and 53.3% to match the output of the unit, and the feed water flow is adjusted within a certain range through another pump, basically It can meet the load conditions of the unit. Even if the output of the feed water pump does not match the load of the unit, the thermal control system of the unit can still use the RB function to make the unit reach a safe working condition.

If the unit is in single-pump operation, the four-quadrant frequency converter 16 and the speed-regulating motor 15 break down, and after the feedwater pump is switched to constant-speed operation, the feedwater flow can still be adjusted through the minimum flow valve of the pump.

Accident linkage working condition: when the pump set is on standby, the incoming switch 26 of the phase-shifting transformer is in the closing state, the phase-shifting transformer is charged, the four-quadrant inverter 16 is in the power-on standby state, the speed regulating motor switch 20 is in the closing state, the main drive The motor inlet switch is in the closed state. When the pump connection signal is sent out, the main drive motor bypass switch 18 will be interlocked, and the main drive motor 1 will be turned on at full pressure, driving the inner ring gear 4 to increase speed, thereby driving the planetary carrier 5 and Sun gear 6 speeds up, and sun gear 6 drives feed water pump 8 to speed up. Due to the resistance of feed water pump 8, planetary carrier 5 will give priority to speed up, thereby driving speed-regulating end idler 9 to speed up. When its speed has an overrunning clutch output When the speed of the end gear 12 is trending, the synchronous automatic clutch 11 is engaged. At this time, the planetary gear device becomes a constant speed ratio gearbox and follows the main drive motor 1 to increase speed synchronously. When the main drive motor 1 is at a constant speed, the speed of the feed water pump 8 reaches 53.3% of the rated speed , during the speed-up process of the pump set, the four-quadrant frequency converter 16 tracks its speed through the encoder installed on the speed-regulating motor 15, and the four-quadrant frequency converter 16 starts to output the frequency corresponding to the synchronous speed of the speed-regulating motor 15, and according to the voltage-frequency curve Boosting the voltage completes the process of motor excitation. When the main drive motor 1 is at a constant speed, the four-quadrant frequency converter 16 immediately starts to adjust the frequency to quickly reach the target frequency, so that the feed water pump 8 can reach the required output.

Embodiment 2: A high-reliability full-range mechatronic speed control device based on planetary gear transmission, as shown in Figure 6, differs from Embodiment 1 in that the transformer does not use a phase-shifting transformer, but a three-winding transformer, which is determined by The high-voltage winding 30 of the three-winding transformer, the first low-voltage winding 31 of the three-winding transformer (connected to the input terminal of the four-quadrant inverter) and the second low-voltage winding 32 of the three-winding transformer (connected to the speed-regulating motor), the four-quadrant inverter 16 does not use cascading Type, and the single-stage high-pressure type is adopted, and the operation mode is the same as that of Embodiment 1.

Embodiment 3: A high-reliability full-range electromechanical integrated speed control device based on planetary gear transmission, as shown in Figure 7, the difference from Embodiment 2 is that the transformer does not use a three-winding transformer, but a low-voltage intermediate tap. The double-winding transformer is composed of the high-voltage winding 33 of the double-winding transformer and the low-voltage winding 34 of the double-winding transformer (connected to the input end of the four-quadrant frequency converter). The middle tap of the low-voltage winding of the double-winding transformer is connected to the speed-regulating motor.

Claims (6)

1. A high-reliability full-range electromechanical integrated speed control device based on planetary gear transmission, including the main drive motor (1), the main drive end gear (3), the differential planetary mechanism, the speed control end idler gear (9), the speed control Speed end gear (10), synchronous automatic clutch (11), clutch output end gear (12), clutch output end idler gear, speed regulating motor (15), four-quadrant frequency converter (16), main drive motor bypass switch ( 18), factory power system (19), speed regulating motor switch (20) and main drive motor incoming line switch (21), the inner ring gear (4) input shaft of the differential planetary mechanism is connected to the main drive end gear (3) , the main drive gear (3) is connected to the clutch output gear (12) through the clutch output idler gear, the clutch output gear (12) is connected to the output shaft of the synchronous automatic clutch (11), and the main drive motor (1) is connected to The gear at the main drive end (3), the sun gear (6) of the differential planetary mechanism is connected to the driven equipment, the planet carrier (5) of the differential planetary mechanism is connected to the idler gear (9) at the speed regulating end, and the idler gear (9) ) meshes with the speed regulating end gear (10), one end of the speed regulating end gear (10) is connected with the speed regulating motor (15), and the speed regulating end idler gear (9) is connected with the input shaft of the synchronous automatic clutch (11); It is characterized in that it also includes an electromagnetic brake (23), a phase shifting transformer, a solid state soft start device (22), a phase shifting transformer incoming line switch (26), a speed regulating motor forward bypass switch (29) and a speed regulating motor reverse To the bypass switch (17), the other end of the speed-adjusting gear (10) is connected to the electromagnetic brake (23), wherein the phase-shifting transformer includes a phase-shifting transformer high-voltage winding (25), a phase-shifting transformer first low-voltage winding (27) and the second low-voltage winding (28) of the phase-shifting transformer, the second low-voltage winding (28) of the phase-shifting transformer respectively passes through the forward bypass switch (29) of the speed regulating motor, the reverse bypass switch (17) of the speed regulating motor and the speed regulating The motor (15) is connected, the first low-voltage winding (27) of the phase-shifting transformer is connected to the input end of the four-quadrant inverter (16), and the output end of the four-quadrant inverter (16) is connected to the speed regulating motor switch (20) for speed regulation The motor (15), the high-voltage winding of the phase-shifting transformer (25) is connected to the utility power system (19) through the phase-shifting transformer incoming switch (26), and one end of the solid-state soft start device (22) passes through the main drive motor incoming switch (21) It is connected to the plant power system (19), the other end is connected to the main drive motor (1), and the two ends of the solid-state soft starter (22) are also connected in parallel with a main drive motor bypass switch (18). 2. The high-reliability full-range electromechanical integrated speed regulating device based on planetary gear transmission according to claim 1, characterized in that: the phase-shifting transformer is replaced by a double-winding transformer or a three-winding transformer, and the low-voltage winding of the double-winding transformer has The middle tap, the low-voltage winding (34) of the double-winding transformer is connected to the input end of the four-quadrant frequency converter (16), the middle tap of the low-voltage winding (34) of the double-winding transformer is connected to the bypass switch of the speed-regulating motor (15), and the three-winding transformer The first low-voltage winding (31) of the three-winding transformer is connected to the input end of the four-quadrant frequency converter (16), and the second low-voltage winding (32) of the three-winding transformer is connected to the bypass switch of the speed regulating motor. 3. The high-reliability full-range mechatronic speed regulating device based on planetary gear transmission according to claim 1 or 2, characterized in that the speed regulating motor (15) is replaced by a servo motor. 4. The high-reliability full-range electromechanical integrated speed regulating device based on planetary gear transmission according to claim 1 or 2, characterized in that: the idler gear at the output end of the clutch is a two-stage idler gear (13) at the output end of the clutch, which is Other stages are also possible for matching gear center distances or steering, as well as setting idlers in other locations. 5. The high-reliability full-range mechatronic speed regulating device based on planetary gear transmission according to claim 1 or 2, characterized in that: the transmission mechanism can include a speed regulating motor, an idler gear at the speed regulating end, and a speed regulating end gear , synchronous automatic clutch, clutch output gear and clutch output idler, the transmission mechanism can also only include speed-regulating motor, speed-regulating idler, speed-regulating gear, on the basis of the original set of traditional mechanisms, you can add another A set of transmission mechanisms. 6. The high-reliability full-range electromechanical integrated speed control device based on planetary gear transmission according to claim 1 or 2, characterized in that: the speed control motor (15) is a high-speed motor, and the design frequency is higher than the power frequency.

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