1. A regenerative power storage system for a Direct Current (DC) electric railway car, the regenerative power storage system comprising:
an inverter converting a DC power supplied through a pantograph into an AC power in order to drive at least one motor;
a first filter unit connected between the pantograph and the inverter in series with the inverter and removing high frequency components of the DC power, the first filter unit including an first inductor and a first capacitor;
a charging unit connected between the first filter unit and the inverter in parallel with the inverter, and preventing an over current from passing therethrough;
a second filter unit connected to the charging unit in series, and configured to remove high frequency components of the DC power supplied through the charging unit, the second filter unit including a second inductor and a second capacitor;
a storage unit connected to the second filter unit and configured to store the DC power which passed through the second filter unit;
a bidirectional DCDC converter electrically connected between the second filter unit and the storage unit in series, and controlled such that the bidirectional DCDC converter is open or closed in charging mode or electricity mode in response to a control signal;
a DCDC filter electrically connected between the bidirectional DCDC converter and the storage unit in series, and configured to remove high frequency noise;
a voltage detection unit configured to detect applied voltage of the second filter unit; and
a control unit configured to determine the applied voltage detected by the voltage detection unit, and configured to perform control such that the bidirectional DCDC converter is open or closed.
2. The regenerative power storage system as set forth in claim 1, further comprising a current detection unit detecting an amount of current which flows into the second filter unit, and outputting the detected amount of current to the control unit,
wherein the charging unit further comprises a cut-off switch for opening or closing electrical connection between the pantograph and the charging unit; and
wherein the control unit opens the cut-off switch when over current is detected by the current detection unit.
3. The regenerative power storage system as set forth in claim 1, wherein the charging unit comprises:
an impedance performing impedance matching on circuits;
a cut-off switch configured to cut off the DC power which flows into the charging unit; and
a charging switch connected in series and turning on or off charging of the second capacitor of the second filter unit.
4. The regenerative power storage system as set forth in claim 1, wherein the storage unit comprises a third capacitor, and
the regenerative power storage system further comprising a capacitor monitoring unit for measuring charging voltage of the third capacitor of the storage unit, and outputting the measured charging voltage to the control unit, so that the control unit turns off a first transistor when the storage unit is completely charged during operation in charging mode, and turns off a second transistor when the charging voltage is equal to or lower than a reference voltage during operation in power supply mode.
5. The regenerative power storage system as set forth in claim 4, wherein the first transistor and the second transistor are Insulated Gate Bipolar Transistors (IGBTs).
6. The regenerative power storage system as set forth in claim 1, wherein the DCDC filter comprises an inductor for removing high frequency noise.
7. The regenerative power storage system as set forth in claim 1, wherein the storage unit comprises a super capacitor.
8. The regenerative power storage system as set forth in claim 4, wherein the storage unit further comprises a discharging switch connected to the third capacitor in parallel for discharging charged power of the capacitor.
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. A disk saw felling head, the disk saw felling head having a fore-aft dimension, a lateral dimension, and a vertical dimension such that the fore-aft dimension, the lateral dimension, and the vertical dimension are perpendicular to one another, the disk saw felling head comprising
a frame comprising a first mounting post, a second mounting post, a motor housing, and a horn section, the first and second mounting posts configured for attaching the disk saw felling head to a base machine and spaced laterally apart from one another relative to the lateral dimension and extending vertically relative to the vertical dimension, the horn section mounted to a top portion of the first mounting post and a top portion of the second mounting relative to the vertical dimension,
a disk saw,
a motor attached to the frame and the disk saw to rotate the disk saw relative to the frame, the motor positioned within the motor housing,
a harvesting arm attached pivotally to the frame to pivot relative thereto to gather a felled tree,
a harvesting cylinder attached to the frame and the harvesting arm to pivot the harvesting arm relative to the frame,
a bunching arm attached pivotally to the frame to pivot relative thereto to hold the felled tree against the horn section, and
a bunching cylinder attached to the frame and the bunching arm to pivot the bunching arm relative to the frame, the harvesting cylinder or the bunching cylinder positioned above the motor housing relative to the vertical dimension,
a hydraulic line routed through an interior region of the first mounting post and an interior region of the horn section to the harvesting or bunching cylinder.
2. The disk saw felling head of claim 1, wherein the horn section comprises a housing and a horn, the housing is mounted to the top portion of the first mounting post and the top portion of the second mounting post relative to the vertical dimension, and the horn is mounted atop the housing relative to the vertical dimension, and the housing comprises the interior region of the horn section through which the hydraulic line is routed.
3. The disk saw felling head of claim 2, wherein the first mounting post and the housing cooperate to provide a first aperture between the interior region of the first mounting post and the interior region of the housing, the housing comprises an external wall at a bottom of the housing relative to the vertical dimension, the external wall comprises a second aperture positioned laterally between the first and second mounting posts relative to the lateral dimension, and the hydraulic line is routed through the first and second apertures.
4. The disk saw felling head of claim 3, wherein a normal to the first aperture is vertical relative to the vertical dimension, a normal to the second aperture is vertical relative to the vertical dimension, and the housing comprises a bulkhead through which the hydraulic line extends horizontally relative to the vertical dimension.
5. The disk saw felling head of claim 1, wherein the horn section comprises an external wall, the external wall comprises an aperture positioned laterally between the first and second mounting posts relative to the lateral dimension and through which the hydraulic line is routed out of the horn section.
6. The disk saw felling of claim 1, wherein the horn section comprises a bulkhead through which the hydraulic line is routed.
7. The disk saw felling head of claim 1, wherein both the harvesting cylinder and the bunching cylinder are positioned above the motor housing relative to the vertical dimension, the hydraulic line is a first hydraulic line, the first hydraulic line is routed through the interior region of the first mounting post and the interior region of the horn section to the harvesting cylinder, further comprising a second hydraulic line routed through an interior region of the second mounting post and the interior region of the horn section to the bunching cylinder.
8. The disk saw felling head of claim 7, wherein the horn section comprises a housing and a horn, the housing is mounted atop the first mounting post and the second mounting post relative to the vertical dimension, and the horn is mounted atop the housing relative to the vertical dimension, the housing comprises the interior region of the horn section through which the first hydraulic line and the second hydraulic line is routed.
9. The disk saw felling head of claim 8, wherein the first mounting post and the housing cooperate to provide a first aperture between the interior region of the first mounting post and the interior region of the housing, the second mounting post and the housing cooperate to provide a second aperture between the interior region of the second mounting post and the interior region of the housing, the housing comprises a third aperture and a fourth aperture, the third aperture and the fourth aperture are positioned laterally between the first and second mounting posts relative to the lateral dimension and are positioned at an exterior of the horn section, the first hydraulic line is routed through the first and third apertures, and the second hydraulic line is routed through the second and fourth apertures.
10. The disk saw felling head of claim 9, wherein the interior region of the housing comprises a first compartment comprising the third aperture and a second compartment comprising the fourth aperture, the first hydraulic line is routed through the first compartment, and the second hydraulic line is routed through the second compartment.
11. The disk saw felling head of claim 9, wherein the housing comprises an external wall at a bottom of the housing relative to the vertical dimension, and the external wall comprises the third aperture and the fourth aperture.
12. The disk saw felling head of claim 11, wherein the bottom wall is horizontal relative to the vertical dimension such that a normal to the third aperture and a normal to the fourth aperture are vertical relative to the vertical dimension.
13. The disk saw felling head of claim 9, wherein a normal to the first aperture, a normal to the second aperture, a normal to the third aperture, and a normal to the fourth aperture are vertical relative to the vertical dimension, the first hydraulic line is routed along a first routing path, the second hydraulic line is routed along a second routing path, the housing comprises a first bulkhead that is positioned between the first aperture and the third aperture along the first routing path and through which the first hydraulic line is routed and a second bulkhead that is positioned between the second aperture and the fourth aperture along the second routing path and through which the second hydraulic line is routed.
14. The disk saw felling head of claim 13, further comprising a third hydraulic line and a fourth hydraulic line, the third hydraulic line is routed through the interior region of the first mounting post, the first aperture, the first bulkhead, and the third aperture to the bunching cylinder, and the fourth hydraulic line is routed through the interior region of the second mounting post, the second aperture, the second bulkhead, and the fourth aperture to the harvesting cylinder.
15. The disk saw felling head of claim 7, further comprising a third hydraulic line and a fourth hydraulic line, the third hydraulic line is routed through the interior region of the first mounting post and the interior region of the horn section to the bunching cylinder, and the fourth hydraulic line is routed through the interior region of the second mounting post and the interior region of the horn section to the harvesting cylinder.