Non-contact method for measuring temperature of pumping medium

A medium temperature, non-contact technology, applied in the application of thermometers, thermometers, measuring devices, etc., can solve the problems that the rotor magnetic flux cannot be directly measured, the accuracy of calculation is affected, and the temperature coefficient of permanent magnet materials is inconsistent, so as to achieve accurate characterization. Winding Temperature, Accurate Characterization, Facilitate Effect of Winding Temperature
CN103868622AActive Publication Date: 2014-06-18新界泵业(浙江)有限公司 +1
5 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
新界泵业(浙江)有限公司
Publication Date
2014-06-18

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to a non-contact method for measuring the temperature of a pumping medium. The method comprises the steps of step I, immersing a rotor in a motor on the pump body in fluid and running; step II, during the operation of the motor, injecting high-frequency current in the non-breakover phase in real time, and detecting induced potential, detection current and frequency of the no-breakover phase and stator temperature; step III, obtaining the resistance of a stator coil by combining the induced potential, the current, the frequency and the stator inductance, namely the temperature of the stator coil is obtained; step V, obtaining the medium temperature according to the linear relation between the temperature of the stator coil and the medium temperature. The non-contact method for measuring the temperature of the pumping medium has the beneficial effects that the reactance change rate of a winding is detected by a high-frequency pulse current injection method, the change of liquid temperature has no influence on the inductance of a winding, the resistance change rate of the winding can be directly presented by the reactance change rate of the winding, the resistance change rate is only influenced by the winding temperature, and the influencing factor is single.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a non-contact method for measuring the temperature of a pumped medium. Background technique

[0002] The existing technology is to measure the fluid temperature by measuring the magnetic flux of the rotor, which has the following defects: 1. The magnetic flux of the rotor cannot be directly measured, and it is necessary to measure the voltage and current of the motor to calculate the power consumption to characterize its rate of change, the demagnetization of the armature magnetic field and The deviation of the load current will affect the accuracy of the calculation; 2. The rotor magnetic flux is affected by the remanence and coercivity of the permanent magnet material, and the temperature coefficient of the remanence of the permanent magnet material and the coercivity is inconsistent, especially for iron The temperature coefficient of the remanence of the oxygen material is negative, while the temperature coefficient of the c...

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