Servo pump control system and method
First Claim
Patent Images
1. A servo pump control system for a physical model including an electric motor and a hydraulic pump connected to a load and actuated by the electric motor, the system comprising:
- a pressure sensor installed at an output of the hydraulic pump and detecting an output pressure of the hydraulic pump;
a pressure controller for commissioning a plurality of parameters including;
a PID controller receiving the output pressure of the hydraulic pump and generating a first parameter; and
a torque controller receiving a second parameter and a third parameter;
the pressure controller configured to receive a first control signal, the first control signal including a pressure command signal set by a user; and
directly or indirectly provide a second control signal to the electric motor to control the electric motor, the second control signal including a torque control signal generated by the torque controller; and
the pressure controller further configured to automatically commission the plurality of parameters without any manual adjustment, based at least in part on an elastic modulus of the physical model calculated as a ratio of a first derivative of the output pressure of the hydraulic pump to a rotation speed of the electric motor, the the plurality of parameters being automatically commissioned by;
receiving the output pressure of the hydraulic pump and generating the first parameter as an output of the PID controller calculating the second parameter by dividing the output of the PID controller by the elastic modulus;
obtaining the third parameter by multiplying the output pressure of the hydraulic pump by a ratio of a torque command received by the physical model to the output pressure of the pump; and
generating the torque control signal based at least in part on the second parameter and the third parameter received by torque controller.
3 Assignments
0 Petitions
Accused Products
Abstract
A servo pump control system (100) and a corresponding servo pump control method are disclosed. The servo pump control system (100) comprises a pressure controller (101) configured to receive a first control signal, and directly or indirectly provide a second control signal to the electric motor; and the pressure controller (101) configured to automatically commission at least one parameter without any manual adjustment.
-
Citations
12 Claims
-
1. A servo pump control system for a physical model including an electric motor and a hydraulic pump connected to a load and actuated by the electric motor, the system comprising:
- a pressure sensor installed at an output of the hydraulic pump and detecting an output pressure of the hydraulic pump;
a pressure controller for commissioning a plurality of parameters including;
a PID controller receiving the output pressure of the hydraulic pump and generating a first parameter; and
a torque controller receiving a second parameter and a third parameter;
the pressure controller configured to receive a first control signal, the first control signal including a pressure command signal set by a user; and
directly or indirectly provide a second control signal to the electric motor to control the electric motor, the second control signal including a torque control signal generated by the torque controller; and
the pressure controller further configured to automatically commission the plurality of parameters without any manual adjustment, based at least in part on an elastic modulus of the physical model calculated as a ratio of a first derivative of the output pressure of the hydraulic pump to a rotation speed of the electric motor, the the plurality of parameters being automatically commissioned by;
receiving the output pressure of the hydraulic pump and generating the first parameter as an output of the PID controller calculating the second parameter by dividing the output of the PID controller by the elastic modulus;
obtaining the third parameter by multiplying the output pressure of the hydraulic pump by a ratio of a torque command received by the physical model to the output pressure of the pump; and
generating the torque control signal based at least in part on the second parameter and the third parameter received by torque controller. - View Dependent Claims (2, 3, 4, 5)
- a pressure sensor installed at an output of the hydraulic pump and detecting an output pressure of the hydraulic pump;
-
6. A servo pump control method for a physical model including an electric motor and a hydraulic pump connected to a load and actuated by the electric motor, the method comprising:
- receiving a first control signal, the first control signal including a pressure command signal set by a user;
directly or indirectly providing a second control signal to the electric motor by a pressure controller, the second control signal including a torque control signal; and
automatically commissioning a plurality of parameters by the pressure controller without any manual adjustment, based at least in part on an elastic modulus of the physical model calculated as a ratio of a first derivative of an output pressure of the hydraulic pump to a rotation speed of the electric motor, the plurality of parameters being automatically commissioned by;
receiving the output pressure of the hydraulic pump and generating a first parameter as an output of the pressure controller;
calculating a second parameter by dividing the output of the pressure controller by the elastic modulus;
obtaining a third parameter by multiplying the output pressure of the hydraulic pump by a ratio of a torque command received by the physical model to the output pressure of the pump; and
generating the torque control signal based at least in part on the second parameter and the third parameter. - View Dependent Claims (7, 8, 9, 10)
- receiving a first control signal, the first control signal including a pressure command signal set by a user;
-
11. A servo pump control system comprising:
- an electric motor;
a hydraulic pump actuated by the electric motor;
a hydraulic actuator operated by the hydraulic pump, the hydraulic actuator connected to a load and actuating the load; and
a pressure controller configured to provide a torque control signal to the electric motor to control the electric motor, the pressure controller further configured to automatically commission a plurality of parameters without any manual adjustment, based at least in part on an elastic modulus of a physical model, the physical model including at least the electric motor and the hydraulic pump, the elastic modulus calculated based on a rotation speed of the electric motor and an output pressure of a hydraulic fluid from the hydraulic pump, and the pressure controller further configured to;
receive the output pressure of the hydraulic fluid from the hydraulic pump and generate a first parameter as an output of the pressure controller;
calculate a second parameter by dividing the output of the pressure controller by the elastic modulus;
obtain a third parameter by multiplying the output pressure of the hydraulic fluid from the hydraulic pump by a ratio of a torque command received by the physical model to the output pressure of the pump; and
generate the torque control signal based at least in part on the second parameter and the third parameter. - View Dependent Claims (12)
- an electric motor;
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeDanfoss A/S
-
Original AssigneeEaton Intelligent Power Limited (Eaton Corporation PLC.)
-
InventorsChen, Yilun, Cheng, Xiaomeng
-
Primary Examiner(s)Plakkoottam, Dominick L
-
Assistant Examiner(s)Tremarche, Connor J
-
Application NumberUS14/900,044Publication NumberTime in Patent Office1,950 DaysField of Search417440US Class CurrentCPC Class CodesF04B 17/03 driven by electric motorsF04B 19/22 of reciprocating-piston typeF04B 49/06 Control using electricity r...F04B 49/065 and making use of computersF04B 51/00 Testing machines, pumps, or...
