Inverter operating at high switching frequency and method for operating inverter
A technology of switching frequency and inverter, which is applied in the direction of output power conversion device, intermediate conversion to DC conversion equipment, conversion of AC power input to DC power output, etc., and can solve the problem of reducing the proximity of output voltage
Pending Publication Date: 2022-07-15
ROCKWELL AUTOMATION TECH
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Reducing the number of update intervals per cycle of the fundamental voltage reduces how closely the output voltage approximates a sinusoidal waveform
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
[0026] Various features and advantageous details of the subject matter disclosed herein will be described more fully with reference to the non-limiting embodiments described in detail in the following description.
[0027] The subject matter disclosed herein describes a motor controller that has an increased maximum switching frequency without requiring a corresponding increase in the computing power of the motor controller. The motor controller separates the current regulator and modulation routines into separate update intervals. The current regulator executes at a first periodic update rate and the modulation routine executes at a second periodic update rate. In this way, the frequency at which the modulation routine is executed can be increased while keeping the frequency at which the current regulator is executed at a lower rate. Furthermore, the modulation routines can be implemented in dedicated hardware circuits so as not to increase the computational load on the proc...
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 present disclosure relates to an inverter operating at a high switching frequency and a method for operating the inverter. A motor controller executing a current regulator and a modulation routine in separate update intervals provides an improved base voltage waveform for a motor controlled by the motor controller. The current regulator is executed at a first periodic update rate, and the modulation routine is executed at a second periodic update rate, where the frequency at which the modulation routine is executed is at least twice the frequency at which the current regulator is executed. The current regulator and the modulation routine are executed at different frequencies, resulting in the current regulator generating a single voltage reference signal over multiple cycles of the modulation routine. In order to reduce voltage ripples caused by decoupling execution of the current regulator and the modulation routine, the motor controller extrapolates a voltage reference generated by the current regulator into a plurality of voltage reference signals, where a unique voltage reference signal is provided for each cycle of the modulation routine.
Description
technical field [0001] The subject matter disclosed herein relates to motor controllers configured to operate at high switching frequencies. More specifically, the motor controller is configured to execute a current regulator, generate a voltage reference for the motor at a first update rate, and execute a modulation routine to output a desired voltage to the motor at a second update rate. Background technique [0002] As known to those skilled in the art, motor drives are used to control the operation of the motors. According to one general configuration, the motor drive includes a DC bus with a DC voltage of suitable magnitude from which an AC voltage can be generated and provided to the AC motor. The DC voltage may be provided as an input to the motor drive, or alternatively, the motor drive may include a converter section that converts the AC voltage input to a DC voltage present on the DC bus. The converter section can be passive, including conventional diode rectific...
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): H02M7/48H02M5/44H02P27/08
CPCH02M7/48H02M5/44H02P27/085H02M7/5395H02P21/06H02M1/0025H02P21/22H02P21/0003H02P27/08H02P21/18H02M7/5387
Inventor 根纳季·西佐夫佐兰·弗兰科维奇托德·M·厄斯特赖希加里·L·斯基宾斯基
Owner ROCKWELL AUTOMATION TECH