Signal converter and control device
First Claim
Patent Images
1. A signal converter comprising:
- an excitation circuit that generates a carrier signal having a carrier frequency to output the carrier signal to a rotation angle sensor;
a first phase shifter circuit that receives a first phase signal from the rotation angle sensor and shifts a phase of the first phase signal with a pole at a first frequency lower than the carrier frequency;
a second phase shifter circuit that receives a second phase signal from the rotation angle sensor and shifts a phase of the second phase signal with a pole at a second frequency higher than the carrier frequency; and
a synthesizer circuit that combines the phase-shifted first phase signal with the phase-shifted second phase signal and outputs a phase-modulated signal where the carrier signal is phase-modulated by a rotation angle of the rotation angle sensor.
0 Assignments
0 Petitions
Accused Products
Abstract
A signal converter 100 includes, for at least two-phase signals detected by a resolver excited by a carrier signal having a carrier frequency fc, a first phase shifter 101 that shifts a phase of a first phase signal of the resolver with a pole at a frequency f1 lower than the carrier frequency fc, a second phase shifter 102 that shifts a phase of a second phase signal of the resolver with a pole at a frequency f2 higher than the carrier frequency fc, and a synthesizer 103 that combines the phase-shifted first phase signal with the phase-shifted second phase signal.
93 Citations
11 Claims
-
1. A signal converter comprising:
-
an excitation circuit that generates a carrier signal having a carrier frequency to output the carrier signal to a rotation angle sensor; a first phase shifter circuit that receives a first phase signal from the rotation angle sensor and shifts a phase of the first phase signal with a pole at a first frequency lower than the carrier frequency; a second phase shifter circuit that receives a second phase signal from the rotation angle sensor and shifts a phase of the second phase signal with a pole at a second frequency higher than the carrier frequency; and a synthesizer circuit that combines the phase-shifted first phase signal with the phase-shifted second phase signal and outputs a phase-modulated signal where the carrier signal is phase-modulated by a rotation angle of the rotation angle sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A signal converter comprising:
-
an excitation circuit that generates a carrier signal having a carrier frequency to output the carrier signal to a rotation angle sensor; a first phase shifter circuit that shifts a phase of the first combined signal based on a first and second phase signal from the rotation angle sensor with a pole at a first frequency lower than the carrier frequency; a second phase shifter circuit that shifts a phase of the second combined signal based on a third and a fourth phase signal from the rotation angle sensor with a pole at a second frequency higher than the carrier frequency; and a synthesizer circuit that combines the phase-shifted first combined signal with the phase-shifted second combined signal and outputs a phase-modulated signal where the carrier signal is phase-modulated by a rotation angle of the rotation angle sensor, wherein the first and the second phase signals have phases different from each other by roughly 180°
,wherein the third and the fourth phase signals have phases different from each other by roughly 180°
, andwherein the first and the third phase signals have phases different from each other by roughly 90°
.
-
-
9. A control device for a motor, comprising:
-
an excitation circuit that generates a carrier signal having a carrier frequency to output the carrier signal to a rotation angle sensor; a first phase shifter circuit that receives a first phase signal from the rotation angle sensor and shifts a phase of the first phase signal with a pole at a first frequency lower than the carrier frequency; a second phase shifter circuit that receives a second phase signal from the rotation angle sensor and shifts a phase of the second phase signal with a pole a second frequency higher than the carrier frequency; a synthesizer circuit that combines the phase-shifted first phase signal with the phase-shifted second phase signal and outputs a phase-modulated signal where the carrier signal is phase-modulated by a rotation angle of the rotation angle sensor; a synchronization circuit that synchronously wave-detects the phase-modulated signal at the carrier frequency fc and outputs a synchronously wave-detected signal; and a controller that controls the motor based on the synchronously wave-detected signal. - View Dependent Claims (10, 11)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeRenesas Electronics Corporation
-
Original AssigneeRenesas Electronics Corporation
-
InventorsShimizu, Yuji, Hiroshima, Akane, Ono, Yutaka
-
Primary Examiner(s)Perez, James M
-
Application NumberUS15/484,285Publication NumberTime in Patent Office231 DaysField of Search318700, 31840001-40042, 318701-724, 375216-221, 375224-236, 375316-352US Class CurrentCPC Class CodesH04L 27/20 Modulator circuits; Transmi...H04L 27/2053 using more than one carrier...H04L 7/0008 Synchronisation information...
