JP5034914B2 - Elevator control device - Google Patents

Elevator control device Download PDF

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JP5034914B2
JP5034914B2 JP2007317191A JP2007317191A JP5034914B2 JP 5034914 B2 JP5034914 B2 JP 5034914B2 JP 2007317191 A JP2007317191 A JP 2007317191A JP 2007317191 A JP2007317191 A JP 2007317191A JP 5034914 B2 JP5034914 B2 JP 5034914B2
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regenerative
power
resistance value
control device
resistor
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JP2009142103A (en
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佳孝 仮屋
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Mitsubishi Electric Corp
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Description

本発明は、エレベータの制御装置に関するものである。 The present invention relates to an elevator control device.

従来のエレベータの制御装置は、下記特許文献に記載のように、予め定められた速度指令信号とエレベータのかごの走行速度に対応する速度信号との差信号から得られるトルク指令に従ってインバータを制御し、該インバータに接続されている交流モータを可変電圧及び可変周波数の交流電力により駆動させるとともに、交流モータの回生運転時には発電制動用抵抗に電流を流して制動を行うエレベータの制御装置において、速度信号と前記トルク指令の数値を掛け合わせて今後処理すべき回生電力値を演算する演算手段と、発電制動用抵抗の放散熱抵抗と熱時定数から得られる発電制動用抵抗の昇温予想推定値を算出する算出手段を設け、該昇温予想推定値が予め設定された許容値よりも大きい場合にエレベータの運転モードを変更する指示を出力する指示手段を備え、該昇温予想推定値が予め設定された許容値以内ならば、通常の運転モードを維持するものがある。 As described in the following patent document, a conventional elevator control device controls an inverter according to a torque command obtained from a difference signal between a predetermined speed command signal and a speed signal corresponding to the traveling speed of the elevator car. In an elevator control device that drives an AC motor connected to the inverter with AC power having a variable voltage and a variable frequency, and applies current to a power generation braking resistor during regenerative operation of the AC motor, And a calculation means for calculating a regenerative electric power value to be processed in the future by multiplying the value of the torque command, and an estimated temperature rise estimated value of the power braking resistor obtained from the dissipated heat resistance of the power braking resistor and the thermal time constant A calculation means is provided for calculating the elevator operation mode when the estimated temperature rise estimated value is larger than a preset allowable value. Comprises an instruction means for outputting, if within tolerance 該昇 temperature predicted estimate is preset, there is to maintain the normal operation mode.

かかるエレベータの制御装置によれば、発電用抵抗が許容値以上に昇温する前にエレベータの運転モードが抵抗の消費電力を減少させるモードに自動的に変更される。したがって、発電用抵抗の本数を検討する場合、あえて最も過酷な状況を考慮する必要がなくなるため、抵抗本数の削減などが可能になる。 According to such an elevator control device, the elevator operation mode is automatically changed to a mode in which the power consumption of the resistor is reduced before the power generation resistor is heated to a temperature higher than the allowable value. Therefore, when considering the number of resistors for power generation, it is not necessary to consider the most severe situation, so the number of resistors can be reduced.

実開平５−２６９６８号公報Japanese Utility Model Publication No. 5-26968

しかしながら、上記エレベータの制御装置は、回生抵抗の過負荷保護手段として、発電制動用抵抗の放散熱抵抗と熱時定数から得られる発電制動用抵抗の昇温予想推定値を算出する算出手段を用いていたので、回生抵抗の適用誤りや、不良が発生すると、昇温予想推定値の予想が大きく外れるので、回生抵抗の保護が充分でないという課題があった。 However, the control device for the elevator uses, as the regenerative resistance overload protection means, a calculation means for calculating a predicted temperature rise of the power braking resistance obtained from the dissipated heat resistance of the power braking resistance and the thermal time constant. Therefore, if an application error or failure of the regenerative resistor occurs, the predicted temperature rise estimated value greatly deviates, and there is a problem that the regenerative resistor is not sufficiently protected.

本発明は、上記のような課題を解決するためになされたもので、回生抵抗の適用誤りや、不良が発生しても適切に回生抵抗を保護できるエレベータの制御装置を提供することを目的とする。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator control device that can properly protect a regenerative resistor even if a regenerative resistor application error or failure occurs. To do.

第１の発明に係るエレベータの制御装置は、交流電源から得られる交流電力を直流電力に変換するコンバータと、前記直流電力を平滑化するコンデンサと、前記直流電力を交流電力に変換してエレベータのかごを駆動するモータに供給するインバータと、前記かごの速度指令信号に対して追従するようにトルク指令信号を出力し、前記インバータを制御する制御装置と、回生運転時に発生する回生電力を回生抵抗に流す半導体素子と、オン・オフ信号を発生して該半導体素子のオン・オフを制御する駆動手段とを有するエレベータの制御装置において、前記回生運転時のトルク指令信号と前記速度指令信号に基づき回生電力を演算する回生電力演算手段と、前記駆動手段のオン・オフ信号から前記回生抵抗に印加される印加電圧を演算する電圧演算手段と、前記回生電力と前記印加電圧から前記回生抵抗の抵抗値を演算する抵抗値演算手段と、を備えたことを特徴とするものである。
ここに、速度指令信号に基づきとは、かご又はモータの速度検出信号をも含む。 According to a first aspect of the present invention, there is provided an elevator control apparatus comprising: a converter that converts AC power obtained from an AC power source into DC power; a capacitor that smoothes the DC power; and a converter that converts the DC power into AC power. An inverter that supplies a motor that drives the car, a torque command signal that follows the speed command signal of the car, a control device that controls the inverter, and a regenerative resistor that generates regenerative power during regenerative operation In an elevator control device having a semiconductor element to be flown through and a driving means for generating an on / off signal to control on / off of the semiconductor element, based on the torque command signal and the speed command signal during the regenerative operation Regenerative power calculation means for calculating regenerative power, and electric power for calculating an applied voltage applied to the regenerative resistor from an on / off signal of the drive means. Calculation means, is characterized in that and a resistance value calculation means for calculating the resistance value of the regenerative resistor from the applied voltage and the regenerative power.
Here, based on the speed command signal includes a speed detection signal of a car or a motor.

第２の発明に係るエレベータの制御装置における回生抵抗の異常を判断する基準値は、温度異常と判断する第１基準抵抗値と、回生抵抗の不良と判断する第２基準抵抗値を設ける第２判断手段と、温度異常と判断した場合は、かごの走行速度を下げると共に、前記回生抵抗の不良と判断した場合には、かごの走行を阻止する制御手段を、備えることが好ましい。これにより、回生抵抗の温度異常、不良とに応じて適切にエレベータの走行を制御できる。 The reference value for judging the abnormality of the regenerative resistance in the elevator control device according to the second aspect of the invention is the second reference value for providing the first reference resistance value for judging the temperature abnormality and the second reference resistance value for judging that the regenerative resistance is defective. When it is determined that there is a temperature abnormality, it is preferable to include a control unit that lowers the traveling speed of the car and that prevents the car from traveling when it is determined that the regenerative resistance is poor. Thereby, the traveling of the elevator can be appropriately controlled in accordance with the temperature abnormality or failure of the regenerative resistor.

第３の発明に係るエレベータの制御装置における第２制御手段は、回生抵抗の温度異常と判断した場合にエレベータの走行速度を下げるのは、駆動手段のオン・オフ信号が発生している時のみとする、ことが好ましい。
これにより、エレベータが回生状態にある場合のみ、つまり、回生電力を発生するのを抑制する必要がある場合に限り、エレベータの走行速度を下げることができる。したがって、運転効率を比較的犠牲にせずに回生抵抗を保護できる。 The second control means in the elevator control device according to the third aspect of the present invention reduces the traveling speed of the elevator when it is determined that the temperature of the regenerative resistor is abnormal only when an on / off signal of the driving means is generated. It is preferable that
Thereby, only when the elevator is in a regenerative state, that is, only when it is necessary to suppress the generation of regenerative electric power, the traveling speed of the elevator can be reduced. Therefore, the regenerative resistance can be protected without relatively sacrificing the operation efficiency.

本発明によれば、抵抗値演算手段が回生電力と印加電圧から回生抵抗の抵抗値を演算し、演算された抵抗値が予め設定されている抵抗値に対して所定値以上の差があった場合に、回生抵抗の異常と判断する第１判断部手段とを備えたので、回生抵抗の適用誤りや、不良が発生しても適切に回生抵抗を保護できる。 According to the present invention, the resistance value calculating means calculates the resistance value of the regenerative resistor from the regenerative power and the applied voltage, and the calculated resistance value has a difference of a predetermined value or more with respect to the preset resistance value. In this case, since the first determining means for determining that the regenerative resistance is abnormal is provided, the regenerative resistance can be appropriately protected even if an error or failure occurs in the regenerative resistance.

実施の形態１．
本発明の一実施の形態を図１及び図２によって説明する。図１は本発明の一実施の形態を示すエレベータの全体図、図２は図１に示す半導体素子のオン・オフ状態のタイムチャートである。
図１において、エレベータは、交流電源３から得られる交流電力を直流電力に変換するコンバータ５と、直流電力を平滑化するコンデンサ７と、直流電力を交流電力に変換してかご２３を駆動するモータ１５に供給するインバータ１３と、かご速度指令値に対して追従するようにトルク指令信号を出力し、インバータ１３をＰＷＭ回路５２を介して制御する制御装置３０と、回生運転時に発生する回生電力を回生抵抗１１に誘導する回生素子としてのＭＯＳＦＥＴなどの半導体素子９と、半導体素子９をオン・オフ制御する駆動回路５４とを備えている。 Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of an elevator showing an embodiment of the present invention, and FIG. 2 is a time chart of an on / off state of the semiconductor element shown in FIG.
In FIG. 1, an elevator includes a converter 5 that converts AC power obtained from an AC power supply 3 into DC power, a capacitor 7 that smoothes DC power, and a motor that drives the car 23 by converting DC power into AC power. 15, a torque command signal is output so as to follow the car speed command value, and the inverter 13 is controlled via the PWM circuit 52, and the regenerative power generated during the regenerative operation is A semiconductor element 9 such as a MOSFET as a regenerative element that induces to the regenerative resistor 11 and a drive circuit 54 that controls on / off of the semiconductor element 9 are provided.

エレベータは、モータ１５が巻上機のシーブ１９を回転駆動するように形成しており、シーブ１９の溝には、ロープ１５が掛けられており、ロープ１１の一端には、かご２３が連結固定されると共に、他端には、釣合い錘２５が連結固定されている。
また、モータ１５には、モータ１５の回転速度値を検知して速度検出信号を発生して制御装置３0に入力する速度検出器１７を有している。 The elevator is formed so that the motor 15 rotates and drives the sheave 19 of the hoisting machine. The rope 15 is hung on the groove of the sheave 19, and the car 23 is connected and fixed to one end of the rope 11. In addition, a counterweight 25 is connected and fixed to the other end.
Further, the motor 15 has a speed detector 17 that detects a rotational speed value of the motor 15 to generate a speed detection signal and inputs it to the control device 30.

制御装置３０は、速度指令信号からトルク指令信号を生成してＰＷＭ回路５２に入力する速度制御部３２と、回生運転時のトルク指令信号と速度指令信号又は速度検出信号(両者を速度信号という)とから回生電力を演算する回生電力演算部３４と、駆動回路５４のオン・オフ状態から回生抵抗１１に印加される電圧を演算する電圧演算部３６と、演算された回生電力と回生抵抗１１の印加電圧から回生抵抗１１の抵抗値を演算する抵抗値演算部３７と、演算された抵抗値が予め設定されている抵抗値に対して所定値以上の差があった場合に、回生抵抗１１の異常と判断する第１判断手段としての判断部３８と、回生抵抗１１の異常と判断することによりかご２３が停止後に、次回の走行を阻止する異常制御部３９とを備えている。 The control device 30 generates a torque command signal from the speed command signal and inputs the torque command signal to the PWM circuit 52, a torque command signal and a speed command signal or a speed detection signal during regenerative operation (both are referred to as speed signals). The regenerative power calculation unit 34 that calculates the regenerative power from the above, the voltage calculation unit 36 that calculates the voltage applied to the regenerative resistor 11 from the on / off state of the drive circuit 54, and the calculated regenerative power and the regenerative resistor 11 When the resistance value calculation unit 37 that calculates the resistance value of the regenerative resistor 11 from the applied voltage and the calculated resistance value have a difference of a predetermined value or more with respect to the preset resistance value, the regenerative resistor 11 A determination unit 38 serving as a first determination unit that determines abnormality is provided, and an abnormality control unit 39 that prevents the next traveling after the car 23 is stopped by determining that the regenerative resistor 11 is abnormal.

駆動回路５４は、図２に示すように、エレベータが回生運転状態になると、コンデンサ７の電圧（直流母線電圧）Edが上昇するので、直流母線電圧がある第１基準電圧値ed1を超えるとオン信号を発生して半導体素子９をオンして回生抵抗１１に電流を流し、回生電力を消費し、第２基準電圧値ed2を下回るとオフ信号を発生して半導体素子９をオフするように形成されている。このため、回生運転が続くと、半導体素子９のオン・オフを繰り返して回生電力を回生抵抗１１により消費する。 As shown in FIG. 2, when the elevator enters a regenerative operation state, the drive circuit 54 increases the voltage (DC bus voltage) E d of the capacitor 7, so that the DC bus voltage exceeds a certain first reference voltage value e d1 . And an on signal is generated to turn on the semiconductor element 9 to cause a current to flow through the regenerative resistor 11 to consume regenerative power, and when it falls below the second reference voltage value ed2, an off signal is generated to turn off the semiconductor element 9. Is formed. For this reason, when the regenerative operation continues, the semiconductor element 9 is repeatedly turned on and off, and the regenerative power is consumed by the regenerative resistor 11.

回生電力演算部３４は、回生運転時における速度制御部３２のトルク指令信号τ*[Nm]と、速度信号ω[rad/sec]から回生電力Pr[W]を下式により求めるように形成されている。
Pr＝τ*×ω ・・・(1)
電圧演算部３６は、駆動回路５４のオン・オフ信号から半導体素子９がオンしている比率x[%]を演算し、回生抵抗１１の印加電圧Er[V]を下式により求めるように形成されている。
Er＝(ed1+ed2)／2×ｘ ・・・(2)
ここに、ｘ=オン時間／(オン時間＋オフ時間)×100
抵抗値演算部３８は、上記回生電力Prと回生抵抗１１への印加電圧Er、およびモータ１５等の効率ηを用いて、回生抵抗値Rを下式により求めるように形成されている。
R＝Er2／Pr×η ・・・(3) The regenerative power calculation unit 34 is formed so as to obtain the regenerative power Pr [W] from the torque command signal τ * [Nm] of the speed control unit 32 during the regenerative operation and the speed signal ω [rad / sec] by the following equation. ing.
Pr = τ * × ω (1)
The voltage calculation unit 36 is configured to calculate a ratio x [%] that the semiconductor element 9 is turned on from an on / off signal of the drive circuit 54 and obtain an applied voltage Er [V] of the regenerative resistor 11 by the following equation. Has been.
Er = (e d1 + e d2 ) / 2 × x (2)
Where x = on time / (on time + off time) × 100
The resistance value calculation unit 38 is configured to obtain the regenerative resistance value R by the following equation using the regenerative power Pr, the voltage Er applied to the regenerative resistor 11 and the efficiency η of the motor 15 and the like.
R = Er 2 / Pr × η (3)

上記のように構成されたエレベータの制御装置の動作を図１から図３によって説明する。図３は図１の制御装置の動作を示すフローチャートである。
かご２３が定格負荷で下降運転をすることによりモータ２３が回生運転状態になると、コンデンサ７の電圧（直流母線電圧）Edが上昇するので(ステップＳ１０１)、駆動回路５４は、直流母線電圧がある第１基準電圧値ed1を超えるとオン信号を発生して半導体素子９をオンし、回生抵抗１１に電流を流して回生電力を消費し、第２基準電圧値ed2を下回ると、オフ信号を発生して半導体素子９をオフする。回生運転が続くと、半導体素子９のオン・オフを繰り返して回生電力を回生抵抗１１により消費する(ステップＳ１０３)。 The operation of the elevator control apparatus configured as described above will be described with reference to FIGS. FIG. 3 is a flowchart showing the operation of the control device of FIG.
When the motor 23 is regenerative operation state by the car 23 to the lowered operating at rated load, the voltage of the capacitor 7 (DC bus voltage) E d is increased (step S101), the driving circuit 54, the DC bus voltage When a certain first reference voltage value ed1 is exceeded, an on signal is generated to turn on the semiconductor element 9, current is passed through the regenerative resistor 11 to consume regenerative power, and when it falls below the second reference voltage value ed2, an off signal is generated. And the semiconductor element 9 is turned off. When the regenerative operation continues, the semiconductor element 9 is repeatedly turned on and off, and the regenerative power is consumed by the regenerative resistor 11 (step S103).

回生電力演算部３４は、速度制御部３２のトルク指令信号τ*[Nm]と、速度検出器１７速度検出信号ω[rad/sec]から、回生電力Pr[W]を上記(1)式により求める(ステップＳ１０５)。電圧演算部３６は、駆動回路５４のオン・オフ信号から半導体素子９がオンしている比率x[%]を演算し、回生抵抗１１に印加電圧Er[V]を上記(2)式により求める(ステップＳ１０７)。抵抗値演算部３７は、上記回生電力Prと回生抵抗１１への印加電圧Er、および効率ηを用いて抵抗値Rを上記(3)式により求める(ステップＳ１０９)。 The regenerative power calculation unit 34 calculates the regenerative power Pr [W] from the torque command signal τ * [Nm] of the speed control unit 32 and the speed detector 17 speed detection signal ω [rad / sec] according to the above equation (1). Obtained (step S105). The voltage calculation unit 36 calculates the ratio x [%] that the semiconductor element 9 is turned on from the on / off signal of the drive circuit 54, and obtains the voltage Er [V] applied to the regenerative resistor 11 by the above equation (2). (Step S107). The resistance value calculating unit 37 obtains the resistance value R by the above equation (3) using the regenerative power Pr, the voltage Er applied to the regenerative resistor 11, and the efficiency η (step S109).

判断部３８は、演算された抵抗値が予め設定されている抵抗値に対して所定値以上の差があった場合に、回生抵抗１１の異常と判断する(ステップＳ１１１)。異常と判断された場合、異常制御部３８は、かご２３が停止後、次の起動を阻止し(ステップＳ１１３)、終了する。
一方、ステップＳ１１において、判断部３８が正常と判断した場合には、終了する。 The determination unit 38 determines that the regenerative resistor 11 is abnormal when the calculated resistance value has a difference of a predetermined value or more with respect to the preset resistance value (step S111). If it is determined that there is an abnormality, the abnormality control unit 38 stops the next activation after the car 23 is stopped (step S113) and ends.
On the other hand, if the determination unit 38 determines normal in step S11, the process ends.

実施の形態２．
上記実施の形態１では、判断部３８は、抵抗値演算部３７により算出した抵抗値Rと、予め設定されている抵抗値R0の差が所定の基準値α以上の差があった場合に異常としているが、本実施の形態における第２判断手段としての判断部では、回生抵抗１１の温度異常と判断する第１基準抵抗値α1と、回生抵抗１１の不良と判断する第２基準抵抗値α2を設ける場合の例を示す。 Embodiment 2. FIG.
In the first embodiment, the determination unit 38 determines that the difference between the resistance value R calculated by the resistance value calculation unit 37 and the preset resistance value R 0 is greater than or equal to a predetermined reference value α. Although it is abnormal, in the determination unit as the second determination means in the present embodiment, the first reference resistance value α 1 that determines that the temperature of the regenerative resistor 11 is abnormal, and the second reference resistance that determines that the regenerative resistor 11 is defective. An example in the case of providing the value α 2 is shown.

他の実施の形態を図４によって説明する。図４は、回生抵抗が正常な結線図(a)、回生抵抗が断線した場合の結線図(b)である。
図４(a)において、回生抵抗１１に抵抗値rの抵抗を直列にm、並列にｎ接続して使用する場合を示す。この場合の合成抵抗R0[Ω]は下記となる。
R0＝ｍ／ｎ×ｒ
回生抵抗１１の温度係数をKとし、許容温度上昇度をΔtとすると、温度異常として判断する第１基準抵抗値α1[Ω]は下記となる。
α1＝R0×K×Δt
よって、判断部３８は、抵抗値演算部３７で算出した抵抗値Rと、予め設定されている抵抗R0の差が第１基準抵抗値α1以上となった場合に温度上昇異常と判断し、異常制御部３９は、かご２３の走行速度を下げて走行することにより回生電力の発生量を抑え、回生抵抗１１の温度を下げるようにする。
なお、異常制御部３９は、回生抵抗１１の温度異常と判断した場合にかご２３の走行速度を下げるのは、駆動回路５４からのオン・オフ信号が発生している時のみとしても良い。エレベータが回生状態に限り走行速度を下げるためである。 Another embodiment will be described with reference to FIG. FIG. 4 is a connection diagram (a) in which the regenerative resistor is normal, and a connection diagram (b) in the case where the regenerative resistor is disconnected.
FIG. 4 (a) shows a case where the regenerative resistor 11 is used with a resistor having a resistance value r connected in series m and n connected in parallel. The combined resistance R 0 [Ω] in this case is as follows.
R 0 = m / n × r
When the temperature coefficient of the regenerative resistor 11 is K and the allowable temperature rise is Δt, the first reference resistance value α 1 [Ω] determined as a temperature abnormality is as follows.
α 1 = R 0 × K × Δt
Therefore, the determination unit 38 determines that the temperature rise is abnormal when the difference between the resistance value R calculated by the resistance value calculation unit 37 and the preset resistance R 0 is equal to or greater than the first reference resistance value α 1. The abnormality control unit 39 reduces the amount of regenerative power generated by lowering the traveling speed of the car 23 and lowers the temperature of the regenerative resistor 11.
When the abnormality control unit 39 determines that the temperature of the regenerative resistor 11 is abnormal, the traveling speed of the car 23 may be decreased only when the on / off signal from the drive circuit 54 is generated. This is because the elevator lowers the traveling speed only in the regenerative state.

また、図４(b)において、一部（1箇所）に断線がある場合合成抵抗R'[Ω]は下記となる。
R'＝ ｍ／（ｎ−１）×ｒ
回生抵抗１１の不良と判断する第２基準抵抗値α2[Ω]はとして設定することができる。
α2＝R0×（ｍ／ｎ−ｍ／（ｎ−１））
よって、判断部３８は、抵抗値演算部３７で算出した抵抗値Rと、予め設定されている抵抗値R0の差が第２基準抵抗値α2以上となった場合に、回生抵抗１１の不良と判断し、以後のエレベータの起動を阻止する。
上記の例では、不良を1箇所の断線として説明したが、複数箇所の断線や、一部の抵抗の故障等の場合でも、同様の設定値で異常検出することが可能である。 Further, in FIG. 4B, when a part (one place) is disconnected, the combined resistance R ′ [Ω] is as follows.
R ′ = m / (n−1) × r
The second reference resistance value α 2 [Ω] for determining that the regenerative resistor 11 is defective can be set as follows.
α 2 = R 0 × (m / n−m / (n−1))
Therefore, when the difference between the resistance value R calculated by the resistance value calculation unit 37 and the preset resistance value R 0 is equal to or greater than the second reference resistance value α 2 , the determination unit 38 sets the regenerative resistor 11. Judge as bad and prevent the elevator from starting.
In the above example, the defect has been described as being disconnected at one place. However, it is possible to detect an abnormality with the same set value even in the case of disconnection at a plurality of places, failure of some resistors, or the like.

また、一般的には、第１基準抵抗値α1に比べて第２基準抵抗値α2の方が大きいため、α1＜R−R0＜α2の場合に温度異常、α2＜R−R0の時に回生抵抗１１の不良と判断するが、第１基準抵抗値α1よりも第２基準抵抗値αの方が小さい時は、温度異常を検出する前に、回生抵抗１１の不良を検出することになる。 In general, since the second reference resistance value α 2 is larger than the first reference resistance value α 1 , a temperature abnormality occurs when α 1 <R−R 0 <α 2 , and α 2 <R. -R 0 determines that the regenerative resistor 11 is defective, but if the second reference resistance value α is smaller than the first reference resistance value α 1 , the regenerative resistor 11 is defective before the temperature abnormality is detected. Will be detected.

上記実施形態のエレベータの制御装置は、交流電源３から得られる交流電力を直流電力に変換するコンバータ５と、直流電力を平滑化するコンデンサ７と、直流電力を交流電力に変換してエレベータのかご駆動用のモータに供給するインバータ１３と、かごの速度指令信号に対して追従するようにトルク指令指令信号を出力し、インバータ１３を制御する制御装置３０と、回生運転時に発生する回生電力を回生抵抗１１に流す半導体素子９と、オン・オフ信号を発生して該半導体素子９のオン・オフを制御する駆動回路５４とを有するエレベータの制御装置において、回生運転時のトルク指令信号と速度指令信号から回生電力を演算する回生電力演算部３４と、駆動回路５４のオン・オフ信号から回生抵抗１１に印加される印加電圧を演算する電圧演算部３６と、回生電力と印加電圧から回生抵抗１１の抵抗値を演算する抵抗値演算部３７と、演算された抵抗値が予め設定されている抵抗値に対して所定値以上の差があった場合に、回生抵抗１１の異常と判断する判断部３８とを備えたものである。
これにより、抵抗値演算部３７が回生電力と印加電圧から回生抵抗１１の抵抗値を演算し、演算された抵抗値が予め設定されている抵抗値に対して所定値以上の差があった場合に、回生抵抗１１の異常と判断する判断部３８とを備えたので、回生抵抗１１の適用誤りや、不良が発生しても適切に回生抵抗１１を保護できる。 The elevator control apparatus of the above embodiment includes a converter 5 that converts AC power obtained from the AC power source 3 into DC power, a capacitor 7 that smoothes DC power, and an elevator car that converts DC power into AC power. A torque command command signal is output so as to follow the inverter 13 supplied to the drive motor and the speed command signal of the car, and the control device 30 that controls the inverter 13 and the regenerative power generated during the regenerative operation are regenerated. In an elevator control device having a semiconductor element 9 that flows through a resistor 11 and a drive circuit 54 that generates an on / off signal to control on / off of the semiconductor element 9, a torque command signal and a speed command during regenerative operation The regenerative power calculation unit 34 that calculates the regenerative power from the signal and the applied voltage applied to the regenerative resistor 11 from the on / off signal of the drive circuit 54 are calculated. The voltage calculator 36, the resistance value calculator 37 that calculates the resistance value of the regenerative resistor 11 from the regenerative power and the applied voltage, and the difference between the calculated resistance value that is greater than a predetermined value with respect to the preset resistance value. In this case, a determination unit 38 that determines that the regenerative resistor 11 is abnormal is provided.
Thereby, the resistance value calculation unit 37 calculates the resistance value of the regenerative resistor 11 from the regenerative power and the applied voltage, and the calculated resistance value has a difference of a predetermined value or more with respect to the preset resistance value. Furthermore, since the determination unit 38 that determines that the regenerative resistor 11 is abnormal is provided, the regenerative resistor 11 can be appropriately protected even if an application error or failure of the regenerative resistor 11 occurs.

上記実施形態のエレベータの制御装置における回生抵抗１１の異常を判断する基準値は、温度異常と判断する第１基準抵抗値と、回生抵抗１１の不良と判断する第２基準抵抗値を設ける判断部３８と、温度異常と判断した場合は、エレベータの走行速度を下げると共に、回生抵抗１１の不良と判断した場合には、前記かごの走行を阻止する異常制御部３９とを、備えることが好ましい。
これにより、回生抵抗１１の温度異常、不良とに応じて適切にエレベータの走行を制御できる。 In the elevator control device according to the above embodiment, the reference value for determining the abnormality of the regenerative resistor 11 includes a first reference resistance value for determining that the temperature is abnormal and a second reference resistance value for determining that the regenerative resistor 11 is defective. 38, it is preferable to include an abnormality control unit 39 that lowers the traveling speed of the elevator when it is determined that the temperature is abnormal and prevents the car from traveling when it is determined that the regenerative resistance 11 is defective.
Thereby, the traveling of the elevator can be appropriately controlled according to the temperature abnormality or failure of the regenerative resistor 11.

上記実施形態のエレベータの制御装置における制御部３８は、回生抵抗１１の温度異常と判断した場合にエレベータの走行速度を下げるのは、駆動回路５４のオン・オフ信号が発生している時のみとする、ことが好ましい。
これにより、エレベータが回生状態にある場合のみ、つまり、回生電力を発生するのを抑制する必要がある場合に限り、エレベータの走行速度を下げることができる。したがって、運転効率を比較的犠牲にせずに回生抵抗１１を保護できる。 When the control unit 38 in the elevator control device of the above embodiment determines that the temperature of the regenerative resistor 11 is abnormal, the controller 38 reduces the traveling speed of the elevator only when the on / off signal of the drive circuit 54 is generated. It is preferable that
Thereby, only when the elevator is in a regenerative state, that is, only when it is necessary to suppress the generation of regenerative electric power, the traveling speed of the elevator can be reduced. Therefore, the regenerative resistor 11 can be protected without relatively sacrificing the operation efficiency.

本発明は、エレベータの制御装置に適用できる。   The present invention can be applied to an elevator control device.

本発明の一実施の形態を示すエレベータの全体図である。1 is an overall view of an elevator showing an embodiment of the present invention. 図２は図１に示す半導体素子のオン・オフ状態のタイムチャートである。FIG. 2 is a time chart of the on / off state of the semiconductor element shown in FIG. 図１の制御装置の動作を示すフローチャートである。It is a flowchart which shows operation | movement of the control apparatus of FIG. 本発明の他の実施の形態による回生抵抗が正常な結線図(a)、回生抵抗が断線した場合の結線図(b)である。FIG. 8 is a connection diagram (a) in which the regenerative resistance is normal according to another embodiment of the present invention, and a connection diagram (b) in the case where the regenerative resistance is disconnected.

符号の説明Explanation of symbols

３ 交流電源、５ コンバータ、７ コンデンサ、９ 半導体素子、１３ インバータ、３０制御装置、３４ 回生電力演算部、３６電圧演算部、３７抵抗値演算部、３８ 判断部、３９ 異常制御部、５４ 駆動回路。 3 AC power supply, 5 converter, 7 capacitor, 9 semiconductor element, 13 inverter, 30 control device, 34 regenerative power calculation unit, 36 voltage calculation unit, 37 resistance value calculation unit, 38 determination unit, 39 abnormality control unit, 54 drive circuit .

Claims (3)

交流電源から得られる交流電力を直流電力に変換するコンバータと、前記直流電力を平滑化するコンデンサと、前記直流電力を交流電力に変換してエレベータのかごを駆動するモータに供給するインバータと、前記かごの速度指令信号に対して追従するようにトルク指令信号を出力し、前記インバータを制御する制御装置と、回生運転時に発生する回生電力を回生抵抗に流す半導体素子と、オン・オフ信号を発生して該半導体素子のオン・オフを制御する駆動手段とを有するエレベータの制御装置において、
前記回生運転時のトルク指令信号と前記速度指令信号に基づき回生電力を演算する回生電力演算手段と、
前記駆動手段のオン・オフ信号から前記回生抵抗に印加される印加電圧を演算する電圧演算手段と、
前記回生電力と前記印加電圧から前記回生抵抗の抵抗値を演算する抵抗値演算手段と、演算された抵抗値が予め設定されている抵抗値に対して所定値以上の差があった場合に、前記回生抵抗の異常と判断する第１判断手段と、
を備えたことを特徴とするエレベータの制御装置。 A converter that converts AC power obtained from an AC power source into DC power, a capacitor that smoothes the DC power, an inverter that converts the DC power into AC power and supplies it to a motor that drives an elevator car, and A torque command signal is output so as to follow the speed command signal of the car, and a control device that controls the inverter, a semiconductor element that supplies regenerative power generated during regenerative operation to a regenerative resistor, and an on / off signal are generated. And an elevator control device having driving means for controlling on / off of the semiconductor element,
Regenerative power calculation means for calculating regenerative power based on the torque command signal and the speed command signal during the regenerative operation;
Voltage calculating means for calculating an applied voltage applied to the regenerative resistor from an on / off signal of the driving means;
When there is a difference of a predetermined value or more with respect to a resistance value that is calculated in advance, and a resistance value calculating means that calculates a resistance value of the regenerative resistor from the regenerative power and the applied voltage, First determination means for determining that the regenerative resistance is abnormal;
An elevator control device comprising: 前記第１判断手段の代わりに、
前記回生抵抗の異常を判断する基準値は、温度異常と判断する第１基準抵抗値と、前記回生抵抗の不良と判断する第２基準抵抗値を設ける第２判断手段と、
前記温度異常と判断した場合は、前記かごの走行速度を下げると共に、前記回生抵抗の不良と判断した場合には、前記かごの走行を阻止する制御手段を、
を備えたことを特徴とする請求項１に記載のエレベータの制御装置。 Instead of the first determination means,
The reference value for determining the abnormality of the regenerative resistance is a second determination means for providing a first reference resistance value for determining a temperature abnormality, and a second reference resistance value for determining that the regenerative resistance is defective.
When it is determined that the temperature is abnormal, the traveling speed of the car is reduced, and when it is determined that the regenerative resistance is poor, control means for blocking the traveling of the car,
The elevator control device according to claim 1, further comprising: 前記制御手段は、前記回生抵抗の温度異常と判断した場合に前記走行速度を下げるのは、前記オン・オフ信号が発生している時のみとする、
ことを特徴とする請求項２に記載のエレベータの制御装置。 When the control means determines that the temperature of the regenerative resistor is abnormal, the travel speed is reduced only when the on / off signal is generated.
The elevator control device according to claim 2.
JP2007317191A 2007-12-07 2007-12-07 Elevator control device Expired - Fee Related JP5034914B2 (en)

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