FUEL CELL SYSTEM
First Claim
1. An impedance measuring system which measures the impedance of a fuel cell, including:
- an electronic device connected to the fuel cell and controlled by a frequency;
a detection device that detects the frequency of a control signal to control the electronic device;
a decision device that determines the measurement frequency of the impedance based on the detected frequency; and
a measurement device that measures the impedance at the determined measurement frequency.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided an impedance measuring system which can accurately measure the impedance of a fuel cell. A motor rotation number detection unit successively detects the rotation number of a motor controlled by an inverter and outputs the detection result to a superposition signal generation unit The superposition signal generation unit sets the frequency of an impedance measuring signal to a non-resonant frequency so that the control signal of the motor not resonate with the impedance measuring signal. Thus, by setting the frequency of the impedance measuring signal to the non-resonant frequency, the resonance with the motor is suppressed, which can improve impedance measurement accuracy.
9 Citations
5 Claims
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1. An impedance measuring system which measures the impedance of a fuel cell, including:
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an electronic device connected to the fuel cell and controlled by a frequency; a detection device that detects the frequency of a control signal to control the electronic device; a decision device that determines the measurement frequency of the impedance based on the detected frequency; and a measurement device that measures the impedance at the determined measurement frequency. - View Dependent Claims (2)
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3. An impedance measuring system which measures the impedance of a fuel cell, including:
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a detection device that detects the operation state of the fuel cell; a decision device that determines the measurement frequency of the impedance based on the detected operation state; and a measurement device that measures the impedance at the determined measurement frequency. - View Dependent Claims (4, 5)
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Specification