Check patentability & draft patents in minutes with Patsnap Eureka AI!

Sampling resistor in pulse-width modulation (PWM) controller

A technology for sampling resistors and controllers, which is applied in the direction of resistors, printed circuits connected with non-printed electrical components, non-adjustable metal resistors, etc., which can solve the problem of high welding process requirements, high prices, and increased total product costs. problems, achieve the effect of reducing welding process requirements, reducing product costs, and ensuring sampling accuracy

Inactive Publication Date: 2010-07-28
SHANGHAI RIYONG JEA GATE ELECTRIC
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of this special resistor is generally more expensive, which will increase the total cost of the product. At the same time, in order to ensure the heat dissipation of the resistor and good contact with the circuit board, the welding process is highly required.

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Sampling resistor in pulse-width modulation (PWM) controller
  • Sampling resistor in pulse-width modulation (PWM) controller
  • Sampling resistor in pulse-width modulation (PWM) controller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] See figure 2 The sampling resistor in the PWM controller of the present invention includes a PCB board 4, a first sampling resistor 5, and a second sampling resistor 6. The first sampling resistor 5 and the second sampling resistor 6 are respectively connected across the PCB 4 board.

[0011] The first sampling resistor 5 and the second sampling resistor 6 in the present invention are sheet structures made of tin bronze material. The specific structure of the two sampling resistors is to calculate the size of the required metal parts according to the impedance of the metal material used in the sampling resistor and the required resistance value, and then design the three-dimensional model of the metal parts according to the spatial layout.

[0012] image 3 It is a schematic diagram of the structure of a PWM controller equipped with a sampling resistor of the present invention. The designed first sampling resistor 5 and second sampling resistor 6 are installed in image 3 ...

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

No PUM Login to View More

Abstract

The invention provides a sampling resistor in a PWM controller, comprising a printed circuit board (PCB), a first sampling resistor and a second sampling resistor, wherein the first sampling and the second sampling resistor are respectively bridged on the PCB. Compared with the special sampling resistor, the sampling resistor in the PWM controller can reduce product cost and the requirements of a welding process and simultaneously ensures the sampling precision through temperature difference and impedance compensation.

Description

Technical field [0001] The invention relates to a tooling, in particular to a sampling resistor in a PWM controller. Background technique [0002] In the design of the PWM controller, it is often necessary to extract the value of the bus current for overcurrent protection to prevent damage to the motor or controller components from overcurrent. Therefore, the usual method is to connect a low-resistance sampling resistor in series on the bus, and calculate the bus current by detecting the voltage across the sampling resistor. In product design, a standardized special sampling resistor is generally used, such as figure 1 As shown, it is composed of a copper sheet 1 and a dedicated sampling resistor 2 connected by spot welding points 3, and the pins on the copper sheet 1 are soldered on the circuit board. It is characterized by good high temperature resistance and stable impedance characteristics. However, this kind of special resistor is generally more expensive, which will incre...

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
no application Login to View More
IPC IPC(8): H01C3/00G01R1/20H05K1/18
Inventor 马宝发
Owner SHANGHAI RIYONG JEA GATE ELECTRIC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com