1. An assembly comprising:
a magnetic device comprising a first core portion having an end with first and second faces and a second core portion having an end with first and second faces, the first faces of the first and second core portions defining a substantially planar outer end of the device having a first axis, the second faces of the first and second core portions defining a first air gap therebetween;
a bracket positioned proximate the first face of the first core portion;
a magnetic plate coupled to the bracket, the magnetic plate and the second face of the second core portion defining a second air gap therebetween;
a positioning device coupled to the bracket and effective to drive the bracket and the magnetic plate along a second axis parallel to the first axis between a first position defining a minimum air gap for the assembly and a second position defining a maximum air gap for the assembly; and
the bracket comprising a tab having a tab thickness and extending into the air gap defined by the second faces of the first and second core portions, the tab positioned to engage the second face of the second core portion in the first position wherein the tab thickness defines the minimum air gap for the assembly.
2. The assembly of claim 1 wherein the tab is positioned to engage the second face of the first core portion in the second position wherein the air gap between the second faces of the first and second core portions defines the maximum air gap for the assembly.
3. The assembly of claim 2, wherein the bracket further comprises a first bracket, the assembly further comprising a second bracket coupled to the first core portion and configured to receive the first bracket and the positioning device.
4. The assembly of claim 3, wherein:
the first bracket comprises a first end proximate the outer face of the magnetic device, an opposing second end, and a sloped channel extending therebetween;
the positioning device comprises a screw having a screw axis perpendicular to the first and second axes, and a ring member positioned about and threaded in association with the screw and further disposed within the sloped channel of the first bracket; and
wherein rotation of the screw drives the ring member along the screw axis to engage the sloped channel and further drive the first bracket along the second axis.
5. The assembly of claim 3, wherein:
the first bracket comprises first and second opposing ends and a threaded channel extending therebetween and along the second axis; and
the positioning device comprises a screw received within and correspondingly threaded with the channel of the first bracket, wherein rotation of the screw drives the first bracket along the second axis.
6. A multi-phase converter comprising:
a first converter circuit having a resonant inductor and effective to generate a first phase current based on an inductance associated with the resonant inductor;
a second converter circuit having a trimmable inductor and effective to generate a second phase current based on an inductance associated with the trimmable inductor, the trimmable inductor comprising
a first core portion having an end with first and second faces,
a second core portion having an end with first and second faces, the first faces of the first and second core portions defining a substantially planar outer end of the inductor having a first axis, the second faces of the first and second core portions defining a first air gap therebetween,
a bracket positioned proximate the first face of the first core portion,
a magnetic plate coupled to the bracket, the magnetic plate and the second face of the second core portion defining a second air gap therebetween,
a positioning device coupled to the bracket and effective to drive the bracket and the magnetic plate along a second axis parallel to the first axis between a first position defining a minimum air gap for the trimmable inductor and a second position defining a maximum air gap for the trimmable inductor;
a current sensing circuit effective to detect the first and second phase currents from the converters, a comparison of the detected first and second phase currents further defining a first phase current imbalance state wherein an amplitude of the first phase current is greater than an amplitude of the second phase current and a second phase current imbalance state wherein an amplitude of the second phase current is greater than an amplitude of the first phase current; and
wherein the bracket comprises a tab having a tab thickness and extending into the air gap defined by the second faces of the first and second core portions, the tab positioned to engage the second face of the second core portion in the first position wherein the tab thickness defines the minimum air gap for the trimmable inductor.
7. The converter of claim 6, wherein the tab is positioned to engage the second face of the first core portion in the second position wherein the air gap between the second faces of the first and second core portions defines the maximum air gap for the trimmable inductor.
8. The converter of claim 7, wherein:
the bracket further comprises a first bracket; and
the trimmable inductor further comprises a second bracket coupled to the first core portion that is configured to receive the first bracket and the positioning device.
9. The converter of claim 8, wherein:
the first bracket comprises a first end proximate the outer end of the inductor, an opposing second end, and a sloped channel extending therebetween;
the positioning device comprises a screw having an axis perpendicular to the first and second axes, and a ring member positioned about and threaded in association with the screw and further disposed within the sloped channel of the first bracket; and
wherein rotation of the screw drives the ring member along the screw axis to engage the sloped channel and further drive the first bracket along the second axis.
10. The converter of claim 8, wherein:
the first bracket comprises first and second opposing ends and a threaded channel extending therebetween and along the second axis;
the positioning device comprises a screw received within and correspondingly threaded with the channel of the first bracket; and
wherein rotation of the screw drives the first bracket along the second axis.
11. A method of balancing phase currents in a multi-phase resonant converter having first and second converter circuits, at least one of said converter circuits having a resonant inductor with first and second magnetic core portions having first faces collectively defining an outer edge of the inductor and further having second faces defining a first air gap therebetween, the method comprising:
positioning a magnetic plate proximate the first face of the first core portion and define a second air gap with respect to the second core portion;
detecting a first phase current generated by the first converter circuit;
detecting a second phase current generated by the second converter circuit;
comparing the first and second phase currents to determine a phase current imbalance state; and
driving the magnetic plate based on the determined phase current imbalance state between a first position defining a minimum air gap for the resonant inductor and a second position defining a maximum air gap for the resonant inductor;
wherein the step of positioning a magnetic plate proximate the first face of the first core portion and define a second air gap with respect to the second core portion comprises
positioning a bracket proximate the first face of the first core portion, and
coupling the magnetic plate to the bracket so as to define the second air gap; and
controlling a positioning device coupled to the bracket to drive the bracket and the magnetic plate based on a first determined state wherein an amplitude of the first phase current is greater than the second phase current, and a second determined state wherein an amplitude of the second phase current is greater than the first phase current, wherein the bracket comprises a tab having a tab thickness and extending into the air gap defined by the second faces of the first and second core portions and the tab is positioned to engage the second face of the second core portion in the first position such that the tab thickness defines the minimum air gap for the inductor.
12. The method of claim 11, wherein the tab is positioned to engage the second face of the first core portion in the second position such that the air gap between the second faces of the first and second core portions defines the maximum inductor air gap.
13. The method of claim 11, wherein:
the bracket comprises a first end proximate the outer edge of the inductor, an opposing second end, and a sloped channel extending therebetween;
the positioning device comprises a screw having an axis perpendicular to the first and second axes, and a ring member positioned about and threaded in association with the screw and further disposed within the sloped channel of the first bracket; and
wherein the step of controlling the positioning device comprises rotating the screw and correspondingly driving the ring member along the screw axis to engage the sloped channel and to further drive the first bracket between the first and second positions based on a first determined state wherein an amplitude of the first phase current is greater than the second phase current, and a second determined state wherein an amplitude of the second phase current is greater than the first phase current.
14. The method of claim 11, wherein:
the first bracket comprises first and second opposing ends and a threaded channel extending therebetween;
the positioning device comprises a screw received within and correspondingly threaded with the channel of the first bracket; and
wherein the step of controlling the positioning device comprises rotating the screw and correspondingly driving the first bracket between the first and second positions based on a first determined state wherein an amplitude of the first phase current is greater than the second phase current, and a second determined state wherein an amplitude of the second phase current is greater than the first phase current.
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 dental floss holder, comprising:
a shank (11);
an adjusting member (12) pivotally mounted on the shank;
a cleaning unit (20) detachably mounted on the adjusting member.
2. The dental floss holder of claim 1, wherein
the adjusting member has a side provided with a protruding mounting portion (122);
the shank has an end provided with a rotation portion (111) rotatably mounted on the mounting portion of the adjusting member.
3. The dental floss holder of claim 1, wherein the cleaning unit includes:
a cleaning body (26) detachably mounted on the adjusting member;
a first clearing portion (21) mounted on the cleaning body;
at least two second clearing portions (22) mounted on the cleaning body;
the first clearing portion of the cleaning unit consists of a plurality of scraping pieces (211);
each of the second clearing portions of the cleaning unit consists of a plurality of soft upright rubbing strips (221).
4. The dental floss holder of claim 2, wherein
the mounting portion of the adjusting member has an inside provided with a pivot hole (123);
the rotation portion of the shank includes two elastic pieces (112) each rotatably mounted in the pivot hole of the mounting portion;
the two elastic pieces of the rotation portion are spaced from each other and are arranged radially opposite to each other;
each of the two elastic pieces of the rotation portion has a lower end provided with a protruding stop flange (114) protruding outwardly from the pivot hole of the mounting portion and abutting a bottom of the mounting portion of the adjusting member to prevent the rotation portion of the shank from being detached from the mounting portion of the adjusting member.
5. The dental floss holder of claim 4, wherein
the pivot hole of the mounting portion has a peripheral wall provided with a plurality of adjusting channels (124);
each of the two elastic pieces of the rotation portion has a peripheral wall provided with a plurality of adjusting ribs (113) detachably locked in the adjusting channels of the mounting portion.
6. The dental floss holder of claim 3, wherein the adjusting member has a substantially inverted U-shaped profile and has an inside provided with an operation space (121) to allow passage of the cleaning unit.
7. The dental floss holder of claim 6, wherein
the adjusting member has a peripheral wall provided with a mounting slot (125) which has a substantially inverted U-shaped profile;
the adjusting member has a mediate portion provided with two retaining grooves (126) each connected to the mounting slot;
each of the two retaining grooves of the adjusting member has a substantially C-shaped profile;
the cleaning unit further includes two locking points (23) mounted on the cleaning body;
the two locking points of the cleaning unit are detachably locked in the two retaining grooves of the adjusting member respectively.
8. The dental floss holder of claim 1, wherein the shank has a side provided with a hook-shaped receiving portion (115).
9. The dental floss holder of claim 3, wherein the cleaning body of the cleaning unit has a ring shape or a linear shape.
10. The dental floss holder of claim 1, wherein the cleaning unit is an interdental brush.
11. The dental floss holder of claim 3, wherein the rubbing strips of each of the second clearing portions have different lengths.
12. The dental floss holder of claim 4, wherein
the pivot hole of the mounting portion has a substantially circular shape;
each of the two elastic pieces of the rotation portion has a substantially semi-circular shape.
13. The dental floss holder of claim 7, wherein the mounting slot of the adjusting member has two opposite ends each connected to the operation space.
14. The dental floss holder of claim 7, wherein
the cleaning body of the cleaning unit is divided by the two locking points into a first operation section and a second operation section;
the first operation section of the cleaning body extends through the mounting slot of the adjusting member and extends into the operation space of the adjusting member;
the first clearing portion and one of the second clearing portions on the first operation section of the cleaning body are located in and exposed from the operation space of the adjusting member.
15. The dental floss holder of claim 7, wherein
the shank has a side provided with a hook-shaped receiving portion;
the cleaning body of the cleaning unit extends into the operation space of the adjusting member;
the cleaning body of the cleaning unit is partially received in the mounting slot and the operation space of the adjusting member and partially received in the receiving portion of the shank;
the first clearing portion of the cleaning unit is partially received in the operation space of the adjusting member;
the second clearing portions of the cleaning unit are partially received in the operation space of the adjusting member.
16. The dental floss holder of claim 2, wherein the rotation portion of the shank is detachably mounted on the mounting portion of the adjusting member.
17. The dental floss holder of claim 3, wherein each of scraping pieces of the first clearing portion has an annular chamfered shape.
18. The dental floss holder of claim 2, wherein the mounting portion of the adjusting member has a circular shape.
19. The dental floss holder of claim 7, wherein the cleaning body of the cleaning unit extends through a whole length of the mounting slot.
20. The dental floss holder of claim 13, wherein the cleaning body of the cleaning unit is mounted on the mounting slot of the adjusting member from the two opposite ends of the mounting slot.