US 6,720,698 B2 · Electrical pulse generator using pseudo-random pole distribution

Abstract

A multi-pole electric pulse generator contains poles having a pseudo-random distribution. Preferably, poles are equally sized and spaced, and polarity corresponds to a pseudo-noise binary sequence, which is specifically a primitive polynomial m-sequence. At one point in the rotor's revolution, all rotor poles are aligned with corresponding stator poles to provide maximum net magnetic flux through the armature windings. At all other rotor positions, the poles are misaligned so that the net flux through the armature windings is small. In operation, rotation through the misaligned rotor positions produces essentially no flux change so that no electric power is generated. When the rotor reaches the aligned position, there is a sudden, large flux change which generates a high-energy electric pulse. The exemplary application is for generating an ignition spark of an internal combustion engine.

Claims70

Dependent claims

An electric pulse generating apparatus, comprising:

a rotor;
an electromagnetic armature comprising an electrical conductor arranged in a plurality of poles, each pole having a respective polarity;
a magnetic field apparatus having a plurality of poles, each pole having a respective polarity;
wherein one of said electromagnetic armature and said magnetic field apparatus is mounted on said rotor and the other of said electromagnetic armature and said magnetic field apparatus is not mounted on said rotor, said electromagnetic armature and said magnetic field apparatus being mounted to rotate with respect to each other;
wherein said poles of said armature and said magnetic field apparatus are arranged according to a pseudo-random distribution, such that the poles of said armature are substantially aligned with the poles of said magnetic field apparatus of a corresponding polarity at one or more discrete angular aligned positions of said rotor to produce a relatively large net flux through said armature, and produce a relatively small net flux through said armature at angular positions of said rotor other than said one or more discrete angular aligned positions.

2 more elements

An internal combustion engine, comprising:

at least one combustion chamber;
a respective moveable power member in each said at least one combustion chamber, each said moveable power member enclosing its respective combustion chamber;
a spark ignition apparatus, comprising:
(a) a rotor rotating about an axis and synchronized to the motion of said at least one moveable power member;
(b) a magnetic field apparatus comprising a plurality of permanent magnets arranged as a M equally circumferentially spaced poles, each pole having a respective polarity, the sequence of polarity of said poles being pseudo-random;
(c) an electromagnetic armature comprising an electrical conductor arranged as M equally circumferentially spaced of poles, each pole having a respective polarity, the sequence of polarity of said poles being pseudo-random, wherein one of said electromagnetic armature and said magnetic field apparatus is mounted on said rotor and the other of said electromagnetic armature and said magnetic field apparatus is not mounted on said rotor, said electromagnetic armature and said magnetic field apparatus being mounted to rotate with respect to each other, wherein said poles of said armature and said magnetic field apparatus align at periodic intervals to produce an electric pulse synchronized to the motion of said at least one moveable power member;
and
(d) a spark ignition circuit coupled to said electromagnetic armature, said spark ignition circuit providing a synchronized spark to said at least one combustion chamber.

5 more elements

Dependencies are inferred from the claim text.

Electrical pulse generator using pseudo-random pole distribution

Life of this patent

Electrical pulse generator using pseudo-random pole distribution

Life of this patent

Abstract

Claims70