US 7,009,535 B2Granted

Resolver/digital converter and control apparatus using the same

AssigneeHitachi, Ltd.

InventorsNobuyasu Kanekawa, Shoji Sasaki, Katsuya Oyama, Tomonobu Koseki

Life of this patent

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Abstract

This resolver/digital converter has a resolver, a resolver/digital converting portion and an exciting signal generator. The exciting signal generated from the exciting signal generator is supplied to the resolver, and the resolver signals produced from the resolver are supplied to the resolver/digital converter. This resolver/digital converter further has a conversion trigger generator that generates a conversion trigger signal on the basis of the exciting signal generated from the exciting signal generator, an A/D converter that converts the resolver signals produced from the resolver to digital values in response to the conversion trigger signal generated from the conversion trigger generator, and computing means that detects the failure status on the basis of the digital values produced from the A/D converter.

Claims12

Dependent claims

A control apparatus having at least two subsystems, each of said subsystems comprising:

controllers that produce control signals and diagnosis results;
reliability order judging portions that produce ON/OFF signals based on said diagnosis results;
and
actuators that affect a controlled object based on said control signals and said ON/OFF signals;
wherein
said diagnosis results include an indication of a minor or serious failure of said controllers;
said reliability order judging portions produce ON/OFF signals for making operation of said actuators effective when said failure of said controllers of a subsystem of interest is minor as compared with that of another subsystem;
and
said reliability order judging portions produce ON/OFF signals for making operation of said actuators ineffective when the failure of the controllers of the subsystem of interest is serious as compared with that of said another subsystem.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/211,506Filed 26 Aug 2005 · division
Priority: JP 2004-02036828 Jan 2004
Published: US 2005/0162292 A122 Dec 2005
Granted: 7 Mar 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

B60T 8/885
With failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means: using electrical…
B62D 5/0481
Characterised by control features of the drive means as such: monitoring the steering system, e.g. failures
G01D 5/2073
By influencing the mutual induction between two or more coils: by movement of a single coil with respect to two or more coils
G05B 9/02
Safety arrangements: electric

Family

Application11/043,639Parent of this division · filed 27 Jan 2005
US 2005/0280570 A1Pre-grant publication · published 22 Dec 2005
US 2005/0162292 A1Published application
US 6,972,700 B2Related patent
US 7,009,535 B2This patent

From the US filing history. Foreign family members aren’t listed.