1. A numerical controller, which comprises storage means for storing tabular data, in which a position of a spindle or an axis as a control object is caused to correspond to a reference value composed of time or the position of a reference spindle or axis, and reading means for successively reading a reference value in the tabular data and a position of the spindle or the axis as control object corresponding to the reference value from the storage means, and controls the position of the spindle or the axis as control object based on the reference value read by the reading means, the tabular data stored in the storage means being configured to operate one arbitrary axis, the numerical controller further comprising:
assignment means for assigning the axis to be operated in accordance with the tabular data; and
starting means for starting the tabular data stored in the storage means, thereby causing the axis assigned by the assigning means to operate.
2. The numerical controller according to claim 1, wherein the starting means is an NC program command, signal input, or a command for some other tabular data.
3. The numerical controller according to claim 2, wherein the assigning means is an NC program command, signal input, or a command for the other tabular data constituting the starting means.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus for determining a phase difference between a time-varying voltage and a time-varying current, comprising:
a transmit circuit comprising an antenna, the transmit circuit configured to generate a wireless field via the antenna for transferring charging power to a receiver device, the wireless field based on the time-varying voltage and the time-varying current;
a phase detection circuit configured to output a phase signal indicating a duration of a phase offset between the time-varying voltage and the time-varying current;
a capacitor configured to receive a current from a current source for the duration of the phase offset between the time-varying voltage and the time-varying current; and
at least one switch operably coupled to the capacitor and configured to selectively couple the current from the current source to the capacitor in response to the phase signal, the phase signal allowing activation of the at least one switch.
2. The apparatus of claim 1, wherein the current source comprises a dynamically variable current source, and wherein the current comprises a dynamically variable current from the dynamically variable current source based on an input signal indicating a request to increase or decrease the current based on a voltage of the capacitor compared to a working voltage of the capacitor.
3. The apparatus of claim 1, further comprising a controller configured to determine the phase difference based on a voltage across the capacitor, a capacitance of the capacitor, and the current from the current source.
4. The apparatus of claim 3, wherein the controller is further configured to determine a power of the time-varying voltage and the time-varying current based at least in part on at least one of a peak voltage of the time-varying voltage, or a peak current of the time-varying current, or the phase difference, or any combination thereof.
5. The apparatus of claim 4, wherein the controller is further configured to correct the determined power by a sum of powers of the time-varying voltage and the time-varying current at various harmonic frequencies of the time-varying voltage and the time-varying current.
6. The apparatus of claim 3, wherein the controller is further configured to control a discharge of the capacitor.
7. The apparatus of claim 1, further comprising a controller configured to determine a number of phase cycles over which the phase difference is determined, wherein increasing the number of phase cycles over which the phase difference is determined increases an accuracy of the determined phase difference.
8. The apparatus of claim 1, further comprising a voltage sensor coupled to a transmitter and configured to sense a voltage signal from the transmitter, wherein the time-varying voltage represents the voltage signal sensed by the voltage sensor.
9. The apparatus of claim 8, further comprising a phase compensation circuit configured to limit an effect of the voltage sensor on relative phase shifts between the time-varying voltage and the time-varying current.
10. The apparatus of claim 1, further comprising a current sensor coupled to a transmitter and configured to sense a current signal from the transmitter, wherein the time-varying current represents the current signal sensed by the current sensor.
11. The apparatus of claim 10, further comprising a phase compensation circuit configured to limit an effect of the current sensor on phase shifts between the time-varying voltage and the time-varying current.
12. The apparatus of claim 1, wherein the phase detection circuit is configured to determine a magnitude of the phase offset between the time-varying voltage and the time-varying current, the phase offset indicating a duration between a zero-crossing of the time-varying voltage and a zero-crossing of the time-varying current.
13. The apparatus of claim 1, further comprising a controller configured to calibrate the phase detection circuit using a reference waveform, wherein the reference waveform includes a controlled phase offset between the time-varying voltage and the time-varying current, and configured to characterize and compensate the determined phase difference for a phase measurement error between the time-varying voltage and the time-varying current.
14. The apparatus of claim 1, further comprising amplitude scaling circuits configured to limit amplitudes of the time-varying voltage and the time-varying current to be within 10% of each other.
15. A method for determining a phase difference between a first signal and a second signal, comprising:
generating a phase signal indicating a duration of a phase offset between the first and second signals;
selectively coupling a current source to a capacitor in response to the phase signal, the phase signal allowing activation of at least one switch; and
receiving a current from the current source for the duration of the phase offset between the first and second signals.
16. The method of claim 15, further comprising generating a wireless field for transferring charging power to a receiver device via an antenna coupled to a transmit circuit, the wireless field based on a time-varying voltage and a time-varying current, wherein the first signal comprises the time-varying voltage and the second signal comprises the time-varying current.
17. The method of claim 15, wherein the current source comprises a dynamically variable current source, and wherein the current from the current source comprises a dynamically variable current from the dynamically variable current source based on an input signal indicating a request to increase or decrease the current based on a voltage of the capacitor compared to a voltage capacity or rating of the capacitor.
18. The method of claim 15, further comprising determining the phase difference based on a voltage across the capacitor, a capacitance of the capacitor, and the current from the current source.
19. An apparatus for determining a phase difference between a first signal and a second signal, comprising:
means for generating a phase signal indicating a duration of a phase offset between the first and second signals;
means for receiving a current from a current source for the duration of the phase offset between the first and second signals; and
at least one means for selectively coupling the current from the current source to the means for receiving a current in response to a phase signal, the phase signal allowing activation of the at least one means for selectively coupling.
20. The apparatus of claim 19, further comprising a means for transmitting wireless power to a receiver device, wherein the means for transmitting comprises a means for generating a wireless field based on a time-varying voltage and a time-varying current, wherein the first signal comprises the time-varying voltage and the second signal comprises the time-varying current.