Loading device of electric dynamometer
A technology of electric dynamometer and loading device, which is applied in the direction of measuring device, power meter, instrument, etc., and can solve problems such as failure to meet test requirements, increase equipment cost, and lack of torque closed loop
Inactive Publication Date: 2012-04-04
WUHAN HUAZHONG NUMERICAL CONTROL
View PDF3 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] However, the existing electric dynamometers have the following problems: 1) They often use frequency converters that can work in four quadrants to realize the loading and energy feedback functions, but lack the torque closed-loop function; 2) They need to be equipped with a torque speed tester, Or send the data to the upper computer for observation and analysis, which increases the equipment cost; 3) The current torque speed sensor has only 60 teeth for the speed measurement part, which cannot meet the test requirements for the speed lower than 1rpm
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0014] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0015] Such as figure 1 As shown, the dynamometer loading device of the present invention includes a dual pulse width modulation (Pulse Width Modulation, PWM for short) power circuit 1, a control circuit 2, and a man-machine interface 3.
[0016] The control circuit 2 is connected to the dual PWM power circuit 1 through a cable, and the man-machine interface 3 is connected to the control circuit 2 through a cable.
[0017] The man-machine interface 3 includes buttons 31 and an LCD display 32. The button 31 is used to realize torque input, and the LCD display 32 is used to display the speed, power and torque of the loading motor.
[0018] The control circuit 2 includes a digital signal processor 21, an encoder interface circuit 22, a torque sensor interface circuit 23, and a microcontroller unit 24.
[0019] The digital signal processor 21 is connected to the encoder...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a loading device of an electric dynamometer. The loading device comprises a double PWM (Pulse-Width Modulation) power circuit and a control circuit, wherein the control circuit is connected with the double PWM power circuit through a cable, and the control circuit comprises a digital signal processor (DSP), an encoder interface circuit and a torque sensor interface circuit; and the loading device is characterized in that the DSP is connected with the encoder interface circuit and the torque sensor interface circuit respectively, and the torque sensor interface circuit acquires a torque signal of a torque sensor and transmits the torque signal to the DSP; and the encoder interface circuit is used for receiving a rotating-speed signal from a loading motor and transmitting the rotating-speed signal to the DSP. The loading device adopts the torque closed-loop control so that the control precision of loading the torque can reach 0.1%FS; a high-precision encoder interface is adopted so that the measurement precision can reach 0.1rpm; besides, an integrated design is adopted so that the invention can realize the interface observation and data analysis without requiring a torque rotating-speed tester or an upper computer.
Description
Technical field [0001] The invention relates to a loading device of an electric dynamometer. Background technique [0002] Nowadays, electric dynamometers are widely used in motor, inverter, servo drive testing, automobile chassis testing and other fields. [0003] However, the existing electric dynamometer has the following problems: 1) It often uses a four-quadrant working frequency converter to realize the load and energy feedback function, but lacks the function of torque closed loop; 2) It needs to be equipped with a torque speed tester, Or send the data to the upper computer for observation and analysis, which increases the cost of the equipment; 3) The current speed measurement component of the torque speed sensor has only 60 teeth, which cannot meet the test requirements of speed less than 1rpm. Summary of the invention [0004] In view of this, the object of the present invention is to provide a loading device for an electric dynamometer that can solve the above-mentioned ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/24
Inventor 彭瑞雷力汤前进
Owner WUHAN HUAZHONG NUMERICAL CONTROL