Direct current brushed motor speed measurement device and speed measurement method
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of DC brushed motor and speed measuring device, which is applied in the direction of devices using electric/magnetic methods, and can solve problems such as increasing costs
Inactive Publication Date: 2016-06-15
JIANGSU REYA ELECTRIC
View PDF6 Cites 17 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
At present, the speed detection of brushed motors mainly uses methods such as tachogenerators, photoelectric encoders, and Hall sensors. These methods usually require additional equipment on the motor, which not only greatly increases the cost, but also affects the use of There are still higher requirements for the environment and the mechanical structure of the motor
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0038] Such as figure 1 and figure 2 As shown, the DC brush motor speed measuring device of the present invention includes a current sensor, a filter amplifier circuit, a signal comparison circuit and a controller, and the current sensor, filter amplifier circuit, signal comparison circuit and controller are sequentially connected in series. The controller has a built-in logical operation unit.
[0039] The filtering and amplifying circuit includes a low-pass filtering circuit, a signal amplifying circuit and a high-pass filtering circuit.
[0040] The low-pass filter circuit includes a first resistor 1, the input end of the first resistor 1 is the input end of the low-pass filter circuit, and the output end of the first resistor 1 is the output end of the low-pass filter circuit , and the output terminal of the first resistor 1 is grounded through a first capacitor 2 .
[0041] The signal amplifying circuit includes a first operational amplifier 4, the positive input of t...
Embodiment 2
[0050] Such as figure 1 and image 3 As shown, the DC brush motor speed measuring device of the present invention includes a current sensor, a filter amplifier circuit, a signal comparison circuit and a controller, and the current sensor, filter amplifier circuit, signal comparison circuit and controller are sequentially connected in series. The controller has a built-in logical operation unit.
[0051] The filtering and amplifying circuit includes a low-pass filtering circuit, a signal amplifying circuit and a high-pass filtering circuit.
[0052] The low-pass filter circuit includes a first resistor 1, the input end of the first resistor 1 is the input end of the low-pass filter circuit, and the output end of the first resistor 1 is the output end of the low-pass filter circuit , and the output terminal of the first resistor 1 is grounded through a first capacitor 2 .
[0053] The signal amplifying circuit includes a first operational amplifier 4, the positive input of th...
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 relates to a direct current brushed motor speed measurement device and speed measurement method. The speed measurement device is characterized by comprising a current sensor, a filter amplifying circuit, a signal comparison circuit, and a controller which are serially connected in turn. A logical operation unit is arranged in the controller. The speed measurement method is characterized by comprising the steps of: collecting a current signal of the direction current brushed motor through the current sensor; filtering and removing high frequency noise and direct current component in the current signal through the filter amplifying circuit; amplifying the signal; comparing a pulse component of the current signal with a reference voltage through the signal comparison circuit; generating a high-low alternating square wave speed signal to the controller; finally calculating the period or frequency of the speed signal through a logical operation unit built in the controller; and combining the number of mica sheets in a direct current brushed motor commutator and obtaining the corresponding motor speed through simple calculation. The speed measurement device and the speed measurement method can realize the speed measurement function of the direct current brushed motor through a simple circuit combination without increasing additional large devices on the motor, have low cost and no limitation of the use environment or a motor mechanical structure, and have a more accurate measurement result.
Description
technical field [0001] The invention relates to a test device, in particular to a device and method for measuring the speed of the commutator (ie, the rotor) of a DC brushed motor. Background technique [0002] DC brushed motors are widely used in industrial and civil industries. In order to control the speed of DC brushed motor, it is necessary to detect the rotational speed of the motor first, and then control it. At present, the speed detection of brushed motors mainly uses methods such as tachogenerators, photoelectric encoders, and Hall sensors. These methods usually require additional equipment on the motor, which not only greatly increases the cost, but also affects the use. There are also higher requirements for the environment and the mechanical structure of the motor. Contents of the invention [0003] The problem to be solved by the present invention is to provide a DC brushed motor speed measuring device, which can realize the speed measuring function through...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more