Various control methods can be used to control the hydraulic pump flow to follow the frequency law imposed on the AC motor. A common approach is to use a variable frequency drive (VFD) or inverter drive system. The following is a general method for controlling hydraulic pump flow in conjunction with AC motor frequency: 1. Variable frequency drive (VFD): Install a VFD between the AC power supply and the AC motor that drives the hydraulic pump. VFDs allow precise control of the speed of the motor by adjusting the frequency of the power supply. 2. Frequency Law: Define the required frequency law or speed curve that the hydraulic pump flow should follow. This frequency law dictates the motor speed required at different points in time or under specific operating conditions. 3. Motor Speed Control: Program the VFD to modulate the motor speed according to the imposed frequency law. VFDs usually provide control modes such as speed control, torque control or vector control. In this case, the speed control mode is adapted to achieve the desired motor speed according to the imposed frequency law. 4. Sensor feedback: Use a suitable sensor to measure the actual hydraulic pump flow. This can be achieved by installing flow sensors or pressure sensors in the hydraulic system. Sensor feedback provides real-time information on pump flow. 90-R-055-DD-1-NN-80-P-4-S1-C-GB-GBA-42-42-20 90R055DD1NN80P4S1CGBGBA424220 90-R-055-DD-1-NN-80-P-4-S1-C-GB-GBA-42-42-24 90R055DD1NN80P4S1CGBGBA424224 90-R-055-DD-1-NN-80-R-4-C6-C-G1-GBA-35-35-24 90R055DD1NN80R4C6CG1GBA353524 90-R-055-DD-1-NN-80-R-4-C6-C-GB-GBA-42-42-24 90R055DD1NN80R4C6CGBGBA424224 90-R-055-DD-1-NN-80-R-4-S1-C-GB-GBA-35-35-24 90R055DD1NN80R4S1CGBGBA353524 90R055-DD-1-NN-80-R-4-S1-C-GB-GBA-35-35-24 90R055DD1NN80R4S1CGBGBA353524 90-R-055-DD-1-NN-80-R-4-S1-C-GB-GBA-42-42-24 90R055DD1NN80R4S1CGBGBA424224 90-R-055-DD-1-NN-80-S-4-C6-C-GB-GBA-26-26-24 90R055DD1NN80S4C6CGBGBA262624 90-R-055-DD-1-NN-80-S-4-S1-C-GB-GBA-32-32-20 90R055DD1NN80S4S1CGBGBA323220 90-R-055-DD-1-NN-80-S-4-S1-D-GB-GBA-42-42-24 90R055DD1NN80S4S1DGBGBA424224 90-R-055-DD-2-NN-80-R-4-S1-C-GB-GBA-40-40-24 90R055DD2NN80R4S1CGBGBA404024 90-R-055-DD-2-NN-80-S-3-S1-C-GB-GBA-35-35-24 90R055DD2NN80S3S1CGBGBA353524 90-R-055-DD-5-BC-60-R-4-S1-C-GF-GBA-38-38-24 90R055DD5BC60R4S1CGFGBA383824 90-R-055-DD-5-BC-60-S-3-C6-C-GB-GBA-42-42-24 90R055DD5BC60S3C6CGBGBA424224 90-R-055-DD-5-BC-60-S-4-S1-C-G8-GBA-26-26-20 90R055DD5BC60S4S1CG8GBA262620 90-R-055-DD-5-CD-60-P-4-C6-D-GB-GBA-32-32-24 90R055DD5CD60P4C6DGBGBA323224 90-R-055-DD-5-CD-60-P-4-C6-D-GB-GBA-35-35-20 90R055DD5CD60P4C6DGBGBA353520 90-R-055-DD-5-CD-60-P-4-S1-D-GB-GBA-35-35-20 90R055DD5CD60P4S1DGBGBA353520 90-R-055-DD-5-NN-60-S-4-S1-C-GF-GBA-42-42-24 90R055DD5NN60S4S1CGFGBA424224 90-R-055-DD-5-NN-80-P-3-S1-C-GB-GBA-42-42-24 90R055DD5NN80P3S1CGBGBA424224 5. Closed-loop control: A closed-loop control system is achieved by comparing the required flow (imposed by the law of frequency) with the actual flow measured by the sensor. The control system constantly adjusts the motor speed to minimize any deviation between desired and actual flow. 6. Control Algorithm: Develop a control algorithm that converts the imposed frequency law into a corresponding motor speed command. The control algorithm should take into account system dynamics, response time, and any specific requirements related to hydraulic pump flow characteristics. 7. Control parameters: Adjust VFD control parameters and control algorithms to optimize the performance of the hydraulic pump flow control system. Parameters such as proportional-integral-derivative (PID) gains or motor speed ramp rates may need to be adjusted to achieve stable and accurate control. 8. Testing and Validation: Extensive testing and validation is performed to ensure that the hydraulic pump flow accurately follows the imposed frequency law. Verify the response time, stability and accuracy of the control system under different working conditions and flow requirements. 9. Communication and integration: Establish communication and integration between variable frequency drive (VFD) and hydraulic pump control system. This integration allows seamless coordination between motor speed control and hydraulic pump flow control. Communication protocols such as Modbus or Ethernet/IP can be used to exchange information between the VFD and the pump control system. 90-R-055-DD-5-NN-80-R-4-C6-C-G1-GBA-35-35-24 90R055DD5NN80R4C6CG1GBA353524 90-R-055-DD-5-NN-80-S-3-S1-C-GB-GBA-35-35-24 90R055DD5NN80S3S1CGBGBA353524 90-R-055-DD-5-NN-80-S-3-S1-D-GB-GBA-42-42-24 90R055DD5NN80S3S1DGBGBA424224 90-R-055-HF-1-AB-60-P-4-C6-C-03-GBA-35-35-24 90R055HF1AB60P4C6C03GBA353524 90-R-055-HF-1-AB-60-P-4-S1-C-02-GBA-21-21-20 90R055HF1AB60P4S1C02GBA212120 90-R-055-HF-1-AB-80-D-3-S1-L-03-GBA-20-20-24 90R055HF1AB80D3S1L03GBA202024 90-R-055-HF-1-BB-60-P-4-S1-C-00-GBA-35-35-24 90R055HF1BB60P4S1C00GBA353524 90-R-055-HF-1-BB-60-P-4-S1-C-03-GBA-35-35-24 90R055HF1BB60P4S1C03GBA353524 90-R-055-HF-1-BB-80-R-3-S1-C-03-GBA-26-26-24 90R055HF1BB80R3S1C03GBA262624 90-R-055-HF-1-BC-80-D-3-S1-L-03-GBA-20-20-24 90R055HF1BC80D3S1L03GBA202024 90-R-055-HF-1-BC-80-P-4-S1-C-00-GBA-35-35-24 90R055HF1BC80P4S1C00GBA353524 90-R-055-HF-1-BC-80-R-4-S1-C-03-GBA-20-20-24 90R055HF1BC80R4S1C03GBA202024 90-R-055-HF-1-BC-80-R-4-S1-C-03-GBA-35-35-24 90R055HF1BC80R4S1C03GBA353524 90-R-055-HF-1-CD-60-R-3-S1-C-03-GBA-35-35-24 90R055HF1CD60R3S1C03GBA353524 90-R-055-HF-1-CD-80-D-3-S1-L-03-GBA-20-20-24 90R055HF1CD80D3S1L03GBA202024 90-R-055-HF-1-CD-80-P-3-S1-C-02-GBA-42-42-24 90R055HF1CD80P3S1C02GBA424224 90-R-055-HF-1-CD-80-R-3-C6-C-03-GBA-40-40-24 90R055HF1CD80R3C6C03GBA404024 90-R-055-HF-1-CD-80-R-3-S1-C-00-GBA-32-32-24 90R055HF1CD80R3S1C00GBA323224 90-R-055-HF-1-CD-80-R-3-S1-D-03-GBA-32-32-24 90R055HF1CD80R3S1D03GBA323224 90-R-055-HF-1-CD-80-R-3-S1-D-03-GBA-38-38-24 90R055HF1CD80R3S1D03GBA383824 10. System protection and safety: Implement appropriate safety measures to protect the hydraulic system and ensure personnel safety. This may include overcurrent protection, overvoltage protection, motor and pump temperature monitoring, and emergency stop functions. Safety interlocks should be in place to prevent any hazardous situation or excessive pump flow. 11. System Response and Transient Behavior: Consider system response and transient behavior during acceleration and deceleration. Rapid changes in motor speed can affect the hydraulic system, causing pressure fluctuations or hydraulic shocks. The control algorithm and system design should take these transient effects into account and provide a smooth and controlled transition of motor speed to minimize any adverse effects on hydraulic pump flow. 12. Feedback and feedforward control: Combine feedback and feedforward control technology to improve the accuracy and response of the hydraulic pump flow control system. Feedback control uses measured flow information to adjust motor speed and maintain desired flow. Feedforward control uses additional information, such as input command signals or predictions of system behavior, to predict changes in flow and actively adjust motor speed. 13. System Optimization: Continuously monitor and optimize control system performance to improve efficiency and accuracy. This may involve fine-tuning control parameters, analyzing system data and identifying opportunities for improvement. Implementing advanced control strategies, such as adaptive control or model predictive control, can further improve the performance and responsiveness of the control system. 90-R-055-HF-1-CD-80-R-4-S1-C-03-GBA-20-20-24 90R055HF1CD80R4S1C03GBA202024 90-R-055-HF-1-NN-60-P-4-C6-C-03-GBA-17-17-20 90R055HF1NN60P4C6C03GBA171720 90-R-055-HF-1-NN-60-P-4-S1-D-03-GBA-29-29-24 90R055HF1NN60P4S1D03GBA292924 90-R-055-HF-1-NN-60-R-3-S1-C-03-GBA-35-35-24 90R055HF1NN60R3S1C03GBA353524 90-R-055-HF-1-NN-60-S-3-C6-C-00-GBA-35-35-24 90R055HF1NN60S3C6C00GBA353524 90-R-055-HF-1-NN-60-S-3-C6-C-02-GBA-38-38-20 90R055HF1NN60S3C6C02GBA383820 90-R-055-HF-1-NN-60-S-3-C6-D-03-GBA-35-35-24 90R055HF1NN60S3C6D03GBA353524 90-R-055-HF-1-NN-80-P-4-S1-C-02-GBA-42-42-24 90R055HF1NN80P4S1C02GBA424224 90-R-055-HF-1-NN-80-R-3-S1-C-00-GBA-32-32-24 90R055HF1NN80R3S1C00GBA323224 90-R-055-HF-1-NN-80-R-4-S1-C-03-GBA-20-20-24 90R055HF1NN80R4S1C03GBA202024 90-R-055-HF-1-NN-80-R-4-S1-C-03-GBA-35-35-24 90R055HF1NN80R4S1C03GBA353524 90-R-055-HF-1-NN-80-R-4-S1-D-03-GBA-35-35-24 90R055HF1NN80R4S1D03GBA353524 90-R-055-HF-1-NN-80-R-4-T1-C-03-GBA-29-29-24 90R055HF1NN80R4T1C03GBA292924 90-R-055-HF-2-AB-60-P-4-C6-C-00-GBA-26-26-26 90R055HF2AB60P4C6C00GBA262626 90-R-055-HF-2-AB-60-S-3-S1-D-03-GBA-42-42-24 90R055HF2AB60S3S1D03GBA424224 90-R-055-HF-2-BC-60-S-3-S1-C-03-GBA-32-32-24 90R055HF2BC60S3S1C03GBA323224 90-R-055-HF-2-CD-60-S-3-C6-C-03-GBA-32-32-24 90R055HF2CD60S3C6C03GBA323224 90-R-055-HF-2-CD-80-S-3-S1-C-03-GBA-32-32-24 90R055HF2CD80S3S1C03GBA323224 90-R-055-HF-2-NN-80-R-4-S1-D-04-GBA-35-35-24 90R055HF2NN80R4S1D04GBA353524 90R055-HF-5-AB-60-L-4-C6-D-03-GBA-29-29-20 90R055HF5AB60L4C6D03GBA292920 14. Fault detection and diagnosis: Incorporate fault detection and diagnosis functions into the control system to identify and resolve any abnormalities or faults. This may involve monitoring motor and pump performance parameters, detecting deviations from expected behavior, and providing real-time alerts or alerts for maintenance or troubleshooting. 15. Energy efficiency considerations: Consider energy efficiency when controlling hydraulic pump flow. Optimize motor speed and pump flow to minimize energy consumption while still meeting frequency law requirements. Variable speed control allows the pump to run at the most efficient speed for a given flow demand, reducing energy waste. By following these points, the hydraulic pump flow can be effectively controlled according to the frequency law imposed on the AC motor. This allows precise regulation of pump flow and facilitates applications where specific frequency-dependent flow requirements need to be met.