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1.发明授权
公开(公告)号：US3761796A
公开(公告)日：1973-09-25
申请号：US25656472
申请日：1972-05-24
Applicant: DANFOSS AS
Inventor： JENSEN A
CPC classification number: H02M3/137
Abstract: An inverter arrangement including controlled rectifiers, the inverter being supplied by a regulatable direct voltage supply which includes an on-off switchable element and a filter. A control circuit connected to the output of the supply generates and directs first control pulses to the switchable element, and a pulse generator also connected to the output of the supply generates and directs second control pulses to control the rectifiers in the inverter. The control circuit includes a step regulator having an amplifier, a feedback path and apparatus for producing an oscillation, the step regulator having the effect of altering both the frequency and the width of the first control pulses when the voltage at the output of the supply changes.
Abstract translation: 一种包括受控整流器的逆变器装置，逆变器由可调节的直流电源提供，其包括开 - 关可切换元件和滤波器。 连接到电源的输出的控制电路产生并将第一控制脉冲引导到可切换元件，并且还连接到电源的输出的脉冲发生器产生并引导第二控制脉冲以控制逆变器中的整流器。 控制电路包括具有放大器，反馈路径和用于产生振荡的装置的阶跃调节器，该阶跃调节器具有当电源输出端的电压变化时改变第一控制脉冲的频率和宽度的效果 。
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公开(公告)号：US3838331A
公开(公告)日：1974-09-24
申请号：US32910473
申请日：1973-02-02
Applicant: DANFOSS AS
Inventor： JENSEN A
CPC classification number: H02M7/49
Abstract: A three-phase inverter for producing a stepped voltage approximating to a sinusoidal form, and largely free of odd harmonics, wherein, for the purpose of producing each phase voltage a basic and two additional rectangular impulses are summed, the basic impulse being shortened in relation to a halfwave and occupying substantially the entire amplitude-time area of the phase voltage, and the additional impulses having a considerably smaller amplitude and shorter duration than the basic impulse. One of the additional impulses procedes and the other is superimposed on a basic impulse of the same polarity.
Abstract translation: 一种三相逆变器，用于产生近似于正弦形式的阶梯电压，并且很大程度上没有奇次谐波，其中为了产生每个相电压，将基本和两个额外的矩形脉冲相加，基本脉冲相对缩短 达到半波，并且基本上占据相电压的整个幅度 - 时间区域，并且附加脉冲具有比基本脉冲显着更小的幅度和更短的持续时间。 附加脉冲之一过程，而另一个则叠加在相同极性的基本脉冲上。
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3.发明授权
公开(公告)号：US3767988A
公开(公告)日：1973-10-23
申请号：US3767988D
申请日：1970-12-03
Applicant: DANFOSS AS
Inventor： JENSEN A
CPC classification number: H02P27/06 , H02M7/48 , H02P27/047 , H02P2201/03
Abstract: An electrical three-phase generator and motor control circuit. The generator is made of three alike wave-generating units in cascade each generating a respective trapezoidal wave corresponding to a respective phase of the generator. Each unit comprises a small detector in series with a control circuit varying the amplitude of the wave proportionately to a control voltage representative of and corresponding to variations of voltage from voltage sources and applied to a motor and an integrating circuit consisting of an integrating amplifier and an integrating capacitor and a double limiter in parallel therewith. The control voltage is developed by a voltage divider across the motor control circuit.
Abstract translation: 电气三相发电机和电机控制电路。 发电机由级联的三个相同的波形发生单元制成，每个产生相应于发电机的相位的相应的梯形波。 每个单元包括与控制电路串联的小型检测器，该控制电路将波形的幅度成比例地变换成表示并对应于来自电压源的电压的变化并施加到电动机的控制电压，以及由积分放大器和 积分电容器和双限幅器并联。 控制电压由电机控制电路上的分压器开发。
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公开(公告)号：DK140774B
公开(公告)日：1979-11-12
申请号：DK24869
申请日：1969-01-17
Applicant: DANFOSS AS
Inventor： PETERSEN T K , JENSEN A
IPC: H02K20060101 , H02M5/45 , H02P20060101 , H02P27/06 , H02P7/62 , H02P13/18
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Patent Agency Ranking
公开(公告)号：GB1392068A
公开(公告)日：1975-04-23
申请号：GB2482572
申请日：1972-05-25
Applicant: DANFOSS AS
Inventor： JENSEN A
Abstract: 1392068 Inverting systems DANFOSS AS 25 May 1972 [25 May 1971] 24825/72 Heading H2F [Also in Divisions G3 and H3-H4] Apparatus for supplying a desired A.C. to a load, e.g. motor 2 comprises a controllable D.C. supply unit 3 having a constant D.C. supply input Vi and comprising a pulse controlled switching diode SW for controlling the flow of current through the device 3 in an on/off manner, and a filtering and smoothing circuit L, C 1 adapted to supply a constant D.C. output Vu having a magnitude dependent upon the switching frequency and the mark-space ratio of the signals applied to the element SW, to an inverter 1 controlled by an inverter switching pulse generator 8, the inverter supplying A.C. to the motor 2 at a frequency dependent upon that of the pulses generated at 8, the frequency of the generator 8 being controlled in turn by a D.C. voltage derived from Vu via a potential divider R 1 , R 2 , this control signal also being applied to a comparator circuit 9 together with a signal 10 indicative of a desired speed of the motor 2, where a signal O i is produced to control a circuit 11, 12 which supplies the switching pulses to the diode SW, the circuit 11, 12 adapted so that a variation in the signal O i brings about variations in both the switching frequency and mark-space ratio of the output pulses O 0 (see Divisions H3-H5). It is stated that owing to internal effects, the pulses applied at SW may interfere with the pulses applied to the inverter and at certain frequencies of operation of the load the output from the inverter will be unstable. The output from the circuit 11, 12 is such that at low voltage outputs Vu, the switching frequency is small and the duration of the output pulses is also small, and as the voltage output Vu increases this frequency increases to a maximum and then falls, the duration of the pulses becoming longer . The slope of this frequencyagainst output voltage Vu curve ensures that the range of output voltages Vu over which interference may cocur is reduced and hence so too is the range of inverter output frequencies.
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公开(公告)号：SE375663B
公开(公告)日：1975-04-21
申请号：SE567872
申请日：1972-04-28
Applicant: DANFOSS AS
Inventor： JENSEN A
Abstract: An inverter arrangement including controlled rectifiers, the inverter being supplied by a regulatable direct voltage supply which includes an on-off switchable element and a filter. A control circuit connected to the output of the supply generates and directs first control pulses to the switchable element, and a pulse generator also connected to the output of the supply generates and directs second control pulses to control the rectifiers in the inverter. The control circuit includes a step regulator having an amplifier, a feedback path and apparatus for producing an oscillation, the step regulator having the effect of altering both the frequency and the width of the first control pulses when the voltage at the output of the supply changes.
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公开(公告)号：DK130269B
公开(公告)日：1975-01-27
申请号：DK412968
申请日：1968-08-28
Applicant: DANFOSS AS
Inventor： JENSEN A , PETERSEN T K
Abstract: 1,202,466. Control of A.C. motors. DANFOSS A/S. 20 Aug., 1968 [29 Aug., 1967], No. No. 39716/68. Heading H2J. [Also in Division H3] Crossovers between a constant amplitude, variable frequency waveform R, Fig. 4, and a constant and higher frequency, at least parttriangular, variable slope waveform e are sensed by a comparator (11, Fig. 1, not shown), which triggers a square wave generator to produce a width-modulated waveform g R suitable for motor control. The variable frequency waveform R is one of the three phase outputs R, S, T of an oscillator (2) each of which outputs is fed through a resistance (7), which may be variable, to a respective comparator (11) which also receives through a resistance 8, also optionally variable, the output e of an oscillator (1) producing the higher frequency waveform. The resulting square waves, g R , g s , g T are used to control a three-phase motor. A single D.C. signal (B) varies directly the frequency of the wafeforms R, S. T. and varies inversely the slope of the waveform e; and the square waves g R , g s , g T each have an average value whose magnitude is inversely proportional to the slope of e, and whose frequency of variation is directly proportional to the frequency of the waveforms R, S, T. Thus a motor controlled by the square waves has its speed varied at constant torque by the single control voltage (B). Each comparator 11 may include a subtractor and a high amplification null detector; or it may be a Schmitt trigger. In modifications, the control D.C. (B, Fig. 5, not shown) directly controls the oscillator (2), and inversely controls (at 29) a square wave (from 3c) which is then integrated (at 31) to give the variable slope signal e which is fed as before to the comparators (6). A slope detector (33, Fig. 6, not shown) may he added to this arrangement. Alternatively, the D.C. bias (B, Fig. 7, not shown) may be applied to directly control (at 34) the amplitude of the square waves (from 30) which are again integrated (at 31) and applied to the comparators (b), the slope detector (33) in this case providing the conttol signal (B 1 ), inversely proportional to the D.C. control signal (B), for the oscillator (2). The slope detector (Fig. 5, not shown) has a transistor (35) whose base receives the signal e and whose emitter receives the signal e without the square pulses 28 on the peaks. The transistor (35) and a complementary transistor (36) conduct for the period of each pulse (28), the widths of which vary with the slope of the waveform e. The output of the transistor (36) is smoothed and applied to an emitter follower transistor (42) which provides the (B 1 ) signal inversely proportional to (B).
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公开(公告)号：CA926464A
公开(公告)日：1973-05-15
申请号：CA45593
申请日：1969-03-13
Applicant: DANFOSS AS
Inventor： JENSEN A
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公开(公告)号：DE2125804A1
公开(公告)日：1972-12-07
申请号：DE2125804
申请日：1971-05-25
Applicant: DANFOSS AS
Inventor： JENSEN A
Abstract: An inverter arrangement including controlled rectifiers, the inverter being supplied by a regulatable direct voltage supply which includes an on-off switchable element and a filter. A control circuit connected to the output of the supply generates and directs first control pulses to the switchable element, and a pulse generator also connected to the output of the supply generates and directs second control pulses to control the rectifiers in the inverter. The control circuit includes a step regulator having an amplifier, a feedback path and apparatus for producing an oscillation, the step regulator having the effect of altering both the frequency and the width of the first control pulses when the voltage at the output of the supply changes.
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