1. Direct-current potentiometers

2. Alternating current, direct current.

3. Direct current powered air conditioner

4. There a reason you're on direct current?

5. Switch disconnector for galvanic direct current interruption

6. Alternating-current or direct-current motoring dynamometers;

7. Apparatus for transforming direct current to alternating current

8. Machines for transforming direct current to alternating current

9. DC (direct current) to AC (alternate current) inverters

10. Inverters for transforming direct current to alternating current

11. There a reason you' re on direct current?

12. AC/DC (alternating current/direct current) power supplies

13. Direct current (DC)/alternative current (AC) number of phases

14. Direct current is current with no reversals in polarity.

15. Alternating current and direct current portable power supply apparatus

16. DC to AC (direct current to alternating current) inverters

17. Submarine direct-current network comprising high-power energy accumulators

18. Module extraction apparatus of high voltage direct current system

19. It is easier to transmit alternating current than direct current.

20. type of power supply (direct current, alternating current, compressed air

21. Voltage transformers for alternating current (AC) and direct current (DC)

22. The utility model relates to a direct current forcipate ammeter.

23. Are you using alternate or direct current to charge it?

24. type of power supply (direct current, alternating current, compressed air);

25. Direct current (DC)/alternative current (AC) (1) number of phases: ...

26. A driver (308) drives the brushless direct current air curtain fan.

27. Charging current: direct current/alternating current (number of phases/frequency) (3) : ...

28. Transformers, Substations, Electric equipment, Cabinets (panels) of alternating and direct current.

29. Fan units for asynchronous motors, direct current electric motors, servo-motors

30. This fan is operated by a direct-current 12-volt motor.

31. "AC/DC" is an abbreviation meaning "alternating current/direct current" electricity.

32. Research on fuzzy PID control strategy for Brushless direct current motor

33. Electric power train consisting of separate Direct Current- or Alternating Current-buses

34. Alternating current and direct current portable power supply apparatus, systems and modules

35. 8 Diodes are electronic devices which rectify alternating current to direct current.

36. Alternating or direct current motors other than for land vehicles and industrial automation

37. A method and apparatus for converting Direct Current (DC) to Alternating Current (AC).

38. Diode bridge An interconnection of diodes to rectify alternating current to direct current.

39. The invention relates to an inverter (20) for feeding power, which is provided by a direct-current source (10) by means of a direct-current connection (60), into an alternating-current network (30).

40. Control devices for motors for controlling and regulating alternating current and direct current motors

41. Power is most commonly supplied as 600-volt direct current, but there are exceptions.

42. The following distribution systems are allowed for direct current and single-phase alternating current:

43. The constant direct current - stimulation can accelerate the growth and induct tendency of cells.

44. The product concerned includes both direct current voltage lamps and alternating current voltage lamps

45. 6. Magnet power supplies (high power, direct current) having all of the following characteristics:

46. Alternative current motors (AC motors) or direct current motors (DC motors) for land vehicles

47. To help smooth out the Direct Current available here, a capacitor can be used.

48. The product concerned includes both direct current voltage lamps and alternating current voltage lamps.

49. Servers with alternating current (ac)-direct current (dc) Single-Output Power Supply Units (PSUs)

50. These inverters offer direct current (dc)-to-ac conversion efficiencies in excess of # per cent

51. Battery banks emit Direct Current (DC) electricity but domestic electrical systems are Alternating Current (AC).

52. Nickel is electrochemical micromachininged using nanosecond pulse power , millisecond pulse power and direct current power.

53. Apparatus for converting direct current to alternating current, apparatus for transforming, regulating and controlling electricity

54. Methods 78 patients were sinus rhythm by oral quinidine or amiodarone or direct current cardioversion.

55. Alternating to DC (direct current) rectifiers, mains power supply units, and switched mode power supplies

56. These inverters offer direct current (dc)-to-ac conversion efficiencies in excess of 90 per cent.

57. Circuit arrangement for data transmission on direct current lines and inverter having such a circuit arrangement

58. Furthermore, the rectifier converts the alternating current into direct current which keeps the accumulator battery charged.

59. Some kinds of batteries can be recharged by connecting them to a source of direct current.

60. They found that applying both alternating current (AC) and direct current (DC) could solve this problem.

61. As a second step, the present method comprises superposing an alternating signal on the direct current.

62. A high-efficiency device (111) for generating alternating current signals from direct current power is disclosed.

63. The present invention relates to a module extraction apparatus of a high voltage direct current system.

64. According to the invention, the direct current, which varies over time, is selected in such a way that the direct current corresponds to at least half of the instantaneous amplitudes of the alternating current signal to be transmitted.

65. Electric control and regulating apparatus and inverters for transforming direct current from solar cells into alternating current

66. driven by 'on-off’ single phase alternate current' (AC) or ‘brushless direct current’ (BLDC) variable speed motors

67. The arrays may generate power that is selectively distributed to direct current and alternating current power loads.

68. at a time are connected in parallel in an alternating manner during the transmission of direct current.

69. A direct current (DC) generator, not using a permanent magnet, requires a DC field current for excitation.

70. It adopted stepping electronic rheostat and thyristors, and had developed new direct - current motor ( DCM ) adjustable - speed circuit.

71. Wind and hydraulic machines including pumps, vacuum pumps, blowers, compressors and parts of the afore mentioned machines and devices, starting motors, alternating current motors and direct current motors (except for land vehicles) as well as alternating current generators and direct current generators

72. Except electrical power apparatus and instruments, direct current power systems, rectifiers, converters, inverters, control and alarm units, batteries

73. The direct current is set to give a charge of 30 to 60 Coulomb per litre of water.

74. Alternating current motors (AC motors) or direct current motors (DC motors) for land vehicles (not including (their parts))

75. The movement detector generates a sensor signal (SS) containing a direct current component and an alternating current component.

76. Model electric engines speed controlling regulators, direct current as well as alternating current electric motors for driving models

77. Device for the incremental control of a direct-current motor for the cooling fan of a motor vehicle

78. Alternative current motors (AC motors) or direct current motors (DC motors) for land vehicles [not including "their parts"]

79. The plant produces direct current, which after conversion to alternating current is initiated immediately in the power system.

80. Method to enable standard alternating current (ac)/direct current (dc) power adapters to operate in high magnetic fields