Stator current based malfunction detecting system in a variable

Details Stator current based malfunction detecting system in a variable Stator current based malfunction detecting system in a variable

1991-02-19

1993-04-13

Bertsch, Richard A.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 22, 417 53, F04B 4906

Patent

active

052016366

ABSTRACT:
The current invention detects malfunctions in a variable flow delivery pump. These malfunctions prevent the pump from sustaining inherently high accuracy and/or cause damages to the pump. The invention detects the malfunctions without comparing sampled values to a preset absolute value. A malfunction is determined by a pattern of force exerted on a displacement pump in relation to the displacement positions. The pattern is compared to an empirically established range of pattern values. Once a malfunction is determined, the invention responds in a preselected manner.

REFERENCES:
patent: 4180375 (1979-12-01), Magnussen, Jr.
patent: 4225290 (1980-09-01), Allington
patent: 4375346 (1983-03-01), Kraus et al.
patent: 4509901 (1985-04-01), McTamaney et al.
patent: 4617637 (1986-10-01), Chu et al.
patent: 5074755 (1991-12-01), Vincent
Instruction Manual, Milton Roy Flow Control, "High Performance Diaphragm Liquid End [HPD]-Milroyal B, C and D", 60.3.
Instruction Manual, Milton Roy Flow Control, "maxROY B", 118.7.

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