Method and means for detecting motor rotation

Apparatus comprising:

• a signal processor, microcontroller or signal processing module configured at least to:
• receive signaling containing information about a measured change of a magnetic field created by a magnetic circuit driving a motor, the magnetic circuit having some combination of a stator, a rotor, and a motor housing, including where the stator and the rotor comprises permanents magnets and ferromagnetic core, or including where the stator is a wound stator, or where the motor is an AC or DC motor;
• determine corresponding signaling containing information about the speed of rotation of the motor, based upon the signaling received;
• wherein the motor housing is configured with a cut or slot formed therein that produces a leak in the magnetic field, and the apparatus comprises a Hall Effect Sensor configured in relation to the cut or slot to sense the leak in the magnetic field.

Apparatus comprising:

• a signal processor, microcontroller or signal processing module configured at least to:
• receive signaling containing information about a measured change of a magnetic field created by a magnetic circuit driving a motor, the magnetic circuit having some combination of a stator, a rotor, and a motor housing, ferromagnetic core, or including where the stator is a wound stator, or where the motor is an AC or DC motor;
• determine corresponding signaling containing information about the speed of rotation of the motor, based upon the signaling received;
• and
• a Hall Effect Sensor mounted externally to the motor housing and configured to sense some part of the magnetic field that leaves the motor housing, including being mounted on an external surface of the motor housing;
• the magnetic circuit having a ferromagnetic bridge built above the Hall Effect sensor to close the magnetic circuit and cause more flux to go through the Hall Effect sensor contained between the ferromagnetic bridge and the motor housing.

Apparatus comprising:

• a signal processor, microcontroller or signal processing module configured at least to:
• receive signaling containing information about a measured change of a magnetic field created by a magnetic circuit driving a motor, the magnetic circuit having some combination of a stator, a rotor, and a motor housing, including where the stator and the rotor comprises permanents magnets and ferromagnetic core, or including where the stator is a wound stator, or where the motor is an AC or DC motor;
• and
• determine corresponding signaling containing information about the speed of rotation of the motor, based upon the signaling received;
• wherein the motor housing is configured or formed with a hole therein, and the apparatus comprises a Hall Effect sensor that is mounted internally inside the motor, including through the hole.

A method comprising:

• receiving with a signal processor, microcontroller or signal processing module signaling containing information about a measured change of a magnetic field created by a magnetic circuit driving a motor, the magnetic circuit having some combination of a stator, a rotor, and a motor housing, including where the stator and the rotor comprises permanents magnets and ferromagnetic core, or including where the stator is a wound stator, or where the motor is an AC or DC motor;
• determining with the signal processor, microcontroller or signal processing module corresponding signaling containing information about the speed of rotation of the motor, based upon the signaling received;
• mounting externally a Hall Effect Sensor to the motor housing that is configured to sense some part of the magnetic field that leaves the motor housing, including being mounted on an external surface of the motor housing;
• configuring or forming in the motor housing a slot that is cut into the motor housing to allow magnetic flux leakage through the motor housing;
• and
• configuring, mounting or placing the Hall Effect sensor in relation to the slot to detect the magnetic flux leakage passing through the slot in the motor housing.

A method comprising:

• receiving with a signal processor, microcontroller or signal processing module signaling containing information about a measured change of a magnetic field created by a magnetic circuit driving a motor, the magnetic circuit having some combination of a stator, a rotor, and a motor housing, including where the stator and the rotor comprises permanents magnets and ferromagnetic core, or including where the stator is a wound stator, or where the motor is an AC or DC motor;
• determining with the signal processor, microcontroller or signal processing module corresponding signaling containing information about the speed of rotation of the motor, based upon the signaling received;
• configuring the motor housing with a cut or slot formed therein that produces a leak in the magnetic field;
• and
• configuring a Hall Effect Sensor in relation to the cut or slot to sense the leak in the magnetic field.

A method comprising:

• receiving with a signal processor, microcontroller or signal processing module signaling containing information about a measured change of a magnetic field created by a magnetic circuit driving a motor, the magnetic circuit having some combination of a stator, a rotor, and a motor housing, including where the stator and the rotor comprises permanents magnets and ferromagnetic core, or including where the stator is a wound stator, or where the motor is an AC or DC motor;
• determining with the signal processor, microcontroller or signal processing module e corresponding signaling containing information about the speed of rotation of the motor, based upon the signaling received;
• configuring or forming the motor housing with a hole therein;
• and
• mounting internally a Hall Effect sensor inside the motor, including through the hole.