发明名称 Motor pump unit controlled by electric current analysis
摘要 <p>The motor pump includes a high liquid level sensor (6) connected to an input of a microprocessor (8) and out of phase measuring system for measuring so as to send a start signal to the motor or pump only when the sensors detects a high liquid level. An out of phase stability monitoring unit includes a system for measuring the current level and includes an intermediate liquid level sensor (7) which detects a level between high and low corresponding to motor voltage cutoff. The immersed motor/pump unit includes a pump (2) and AC motor (1) having at least a working phase and a microprocessor integrated in one of the inputs to which a supply voltage is applied and to another input from which is sent a signal representing the current absorbed in the motor phase. The microprocessor includes a system for measuring the phase difference between voltage and current. The microprocessor includes: (a) A system for continuous monitoring of the phase difference stability after it has settled at a constant value; (b) Memory for storing out of phase values, and; (c) Supply voltage cutoff switches which interrupt the supply voltage to the motor when, after out of phase is stabilized, the out of phase value, during a set time period, reaches a value greater than the stabilized value and the signal representing the absorbed current is the current passing only through the working phase.</p>
申请公布号 EP1256723(A1) 申请公布日期 2002.11.13
申请号 EP20020290925 申请日期 2002.04.12
申请人 KSB S.A.S 发明人 VINZIO, PASCAL;SYMOENS, LOUIS;BERTHON, JACQUES
分类号 F04D15/02;(IPC1-7):F04D15/02 主分类号 F04D15/02
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