1. An inverter for converting direct current voltage to alternating current voltage comprising:
a first input arranged to be connected to a vessel’s ordinary current supply system, where said current supply system comprises a generator connected to a battery, and
an output arranged to be connected to an alternating current motor, where, for at least a period of time, said alternating current motor requires a first torque M1 in order to rotate,
wherein a regulating circuit is arranged to measure a charging current from said generator to said battery and to measure the voltage level in said battery,
said regulating circuit is, in addition, arranged to permit an output current from said vessel’s ordinary current supply system to said inverter which is higher than said charging current, in a first operating mode and said regulating circuit is arranged to limit said output current while maintaining the torque for said motor, in a second operating mode,
said regulating circuit is arranged to assume said first operating mode if said battery voltage is over a limit value for the battery voltage, and
said regulating circuit is arranged to assume said second operating mode when said battery voltage is below said limit value for the battery voltage, in order thereby to prevent said battery voltage from dropping further.
2. The inverter as claimed in claim 1, wherein said inverter comprises a second input, on which second input a signal can be applied, said regulating circuit is arranged to assume said first operating mode when said signal assumes a first value, and said regulating circuit is arranged to assume said second operating mode when said signal assumes a second value.
3. The inverter as claimed in claim 2, wherein said regulating circuit is arranged to assume said first operating mode only if said battery voltage is above a limit value for the battery voltage.
4. The inverter as claimed in claim 2, wherein said signal can assume a number of values, with said signal value being proportional to a maximal output current level to which said regulating circuit limits said output current.
5. The inverter as claimed in claim 1, wherein said limiting of the output current is carried out by reducing the voltage and the frequency applied to said alternating current motor in such a way that the ratio between said voltage and frequency is constant, while the current to said alternating current motor is kept constant, in order thereby to reduce the power supplied to said alternating current motor without reducing said torque.
6. The inverter as claims in claim 1, wherein said limit value for said battery voltage is set in such a way that the function of other electronics that are supplied with power from said battery is guaranteed.
7. The inverter as claimed in claim 1, wherein said regulation circuit is arranged to measure said current output from said vessel’s ordinary current supply system, and said regulating circuit is arranged to limit said current output from said vessel’s ordinary current supply system to a limit value for an output current, if said current output exceeds said limit value for the output current.
8. The inverter as claimed in claim 7, wherein said regulating circuit measures said current output by measuring the magnetic field with a Hall element.
9. The inverter as claimed in claim 1, wherein the battery voltage is measured at said first input to said inverter.
10. The inverter as claimed in claim 1, wherein the battery voltage is measured at said battery.
11. The inverter as claimed in claim 1, wherein said output current is measured by measuring the rotational speed of said generator.
12. The inverter as claims in claim 11, wherein the rotational speed of said generator is measured by measuring the ripple on said battery voltage.
13. A method for supplying current to an apparatus in a vehicle than has an ordinary current supply system, said ordinary current supply system comprising a battery which is charged by a generator, said vehicle comprising, in addition, an inverter that has an input connected to said ordinary current supply system and are output connected to said apparatus for supplying said apparatus with an alternating current, the method comprising the steps of:
measuring a charging current from said generator to said battery,
permitting an output current from said ordinary current supply system to said inverter during a first operating mode for supplying said apparatus with current,
limiting said output current from said ordinary current supply system to said inverter during a second operating mode, while retaining the torque to said apparatus, and
measuring the battery voltage, assuming said first operating mode if said battery voltage is above a limit value for the battery voltage, and assuming said second operating mode when said battery voltage is below said limit value for the battery voltage, in order thereby to prevent said battery voltage from dropping still further.
14. The method as claimed in claim 13, wherein said limiting of the output current is carried out by reducing the voltage and the frequency of said alternating current that is applied to said apparatus so that the ratio between said voltage and frequency is constant while the current to said apparatus is kept constant, in order thereby to reduce the power applied to said apparatus without reducing said torque.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
I claim:
1. A clamping type tool bit storage device, comprising:
a clamping member including
a mount segment which extends angularly about a centerline, and which terminates at right and left lateral ends that are spaced apart from each other by a first length in a longitudinal direction transverse to the centerline, and
right and left jaw segments respectively formed with and extending respectively from said right and left lateral ends such that said right and left jaw segments are spaced apart from each other in the longitudinal direction by a second length which is shorter than the first length,
said clamping member being made from a material such that said right and left jaw segments are vested with a biasing force that urges said right and left jaw segments towards each other; and
a plurality of retaining members which are disposed on said mount segment, and which are angularly displaced from one another about the centerline, each of said retaining members being adapted to retain removably a respective one of tool bits, and defining an access line parallel to the centerline such that the respective one of the tool bits retained therein is oriented along the access line.
2. The clamping type tool bit storage device according to claim 1, wherein said mount segment has outer and inner wall surfaces opposite to each other radially relative to the centerline.
3. The clamping type tool bit storage device according claim 2, wherein each of said retaining members includes
a joining portion which is joined to said outer wall surface along a joining line that is parallel to the centerline, and which has right and left lateral sides opposite to each other relative to the joining line, and
right and left grip portions which respectively extend upwardly from said right and left lateral sides and angularly about the access line to terminate at right and left lateral edges that are spaced apart from each other in the longitudinal direction so as to acquire flexibility in the longitudinal direction.
4. The clamping type tool bit storage device according to claim 2, wherein said mount segment has front and rear wall surfaces which are opposite to each other in a direction parallel to the centerline, each of said front and rear wall surfaces interconnecting said outer wall surface and said inner wall surface, each of said retaining members having a retaining hole which is formed in said front wall surface and which extends through said rear wall surface so as to define the access line.
5. The clamping type tool bit storage device according to claim 2, further comprising a magnetically attractive member interposed between said outer and inner wall surfaces and extending angularly about the centerline so as to ensure that the tool bits are retained firmly in said retaining members, respectively.